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Facebook developer George Lee threw down the guantlet at F8 today by saying that he wants each of its 800 million users to have a relationship with at least one developer and that relationship should be focused on content.

"Every single user who is on Facebook should have some relationship with some developer that creates distribution," said Lee.

Mike Lee has been involved in what are arguably some of the software industry's best applications. Delicious Library, Tap Tap Revenge, the Obama '08 app, and Apple's mobile store. Lee has a pretty good idea what users want, and spent about an hour at the St. Louis Strange Loop 2011 conference talking about product engineering and why it's best to imagine users as lazy, stupid, impatient and selfish. Did I mention he was wearing a Mariachi outfit?

Mobile marketing company Tapjoy has been busy of late. One product the Tapjoy team has been looking forward to is the rollout of their mobile video advertising platform which has been in the works for most of the summer. Today, the announced Tapjoy Videos designed to provide mobile advertisers with the brand building power found on the Web and TV.

The future of mobile advertisements is going to be video. It is a tricky problem to institute but the value of video within apps and the mobile Web far outweighs mobile banner ads. Tapjoy thinks it can be the leader in this growing industry segment but does the new video product have the chops?

Software engineer Mohamed Mansour has released a proof-of-concept app for the Google Plus API called Stream+ that tries to bring some order to the chaotic Google Plus stream. "It uses machine learning algorithms to automatically classify the posts into categories," Mansour says in a public post. Stream+ is among the first releases to take advantage of the parts of the API that Google made available last week.

The app itself is not very useful yet, but it's a start. "Some categories are not meaningful," Mansour says, "and I am trying to optimize it further which is quite difficult." But Mansour's insights after developing for the API are instructive. On the Stream+ website, he says that the API was "very easy" to learn and use, but that it suffers from "extreme slowness" in practice.

Mobile cloud platform Appcelerator is having its first-ever developers' conference this week in Mountain View dubbed CODESTRONG. At the conference the company is announcing the "Appcelerator Open Mobile Marketplace" that is essentially a Salesforce AppExchange-like marketplace for independent software vendors and cloud providers. Appcelerator's marketplace is the first ever to bring software and solutions specifically for mobile to a centralized hub and could be an inflection point for how mobile development growth and how tools are bought and shared.

Appcelerator, through its acquisition of Aptana this January, gives it a developer base of almost 1.5 million. The marketplace will be integrated into the company's Titanium platform and provide mobile modules, app templates, design and cloud extensions. Salesforce was a driver behind cloud development with AppExchange. Appcelerator hopes to do the same with mobile.

Amidst all the Facebook news, have you noticed how quiet the Google Plus team has been this week? Too quiet, eh? Here's why: they've just released the first documents for the Google Plus API. Today on the new Google Plus Platform Blog, the Plus team has opened parts of the API to developers, and this is "just the beginning."

The time has come for outside applications built on the Google Plus platform. With this release, Google has laid out its policies for independent developers, which it summarizes with three simple principles: "put the user first, be transparent, and respect user data." And with that, off to the races.

We are in the final stretch of iOS 5 beta as the iPhone 5 is expected to launch in early October. According to Boy Genius Report, iOS 5 Beta 8 is expected to be released this Friday, Sept. 16. The final Gold Masters build is expected to drop a week later, on Sept. 23. Developers, are you ready with your final preparations for the newest version of the iPhone?

In conversations with developers, iOS 5 beta is just about ready to go. They really like the split keyboard functions and feel that it is now stable enough that it runs just as well as iOS 4.3. Battery life, always a problem in early betas, has been fixed. There are still a "few nagging bugs" as one developer put it, but the timeline is well in place for a launch in the next several weeks.

Last week, open source HTML5 framework provider Nitobi and Microsoft announced that PhoneGap is ready for use with Windows Phone Mango. That means that Windows Phone developers can now add Web app functionality into native Mango applications in the same way that they can with iOS and Android. The question remains: Is Windows Phone ever going to be a viable consumer option?

PhoneGap has come charging into the mobile development ecosystem in the last several months. Nitobi's star is hitched to the rise of HTML5 and functional APIs. Yet, Microsoft working with PhoneGap is perhaps further validation of the framework than PhoneGap is a validation of Windows Phone as a legitimate platform.

Mobile development company appMobi wants to push HTML5. It does not want to do this just as a developer framework or an alternative for publishers who are pondering native apps vs. Web apps. AppMobi wants to push HTML5 as its own mobile platform, capable of taking on Android and iOS from an application level.

Last week, the company added a new tool to its HTML5 developer tool kit to further boost HTML5 development. The appMobi Chrome App Packager enables developers to build Web apps and browser extensions and wrap them for submission to the Chrome Web Store.

Twitter co-founder Jack Dorsey has put out a call for comment to the platform's developers. In a note posted on Twitter's developer site he says; "I'd like to ask for your candid feedback. We want to know what additional materials you need from us to help you build products, boost distribution and expand your reach."

Dorsey goes on to express enthusiasm for the future of Twitter, especially concerning the upcoming deep integration into iOS 5. "Very soon, anywhere there's an iPhone or an iPad, you'll always find Twitter." Yet, Twitter's relationship with its developer ecosystem has not always been rosy. Is this an olive branch from the service as it prepares to grow?