ReadWriteWeb

Paul Buchheit built the first version of Gmail in one day. Then, he built the first prototype of Google's contextual advertising service, Adsense, in one day as well. Now, he's working on a much-watched startup called FriendFeed that he believes just brought to market the next big form of communication online: flowing, multi-person, real-time conversations.

"The open, realtime discussions that occur on FriendFeed," he says, "are going to become a major new communication medium on the same level as email, IM and blogging." That's a pretty ambitious claim, but Buchheit has the credibility to make it.

Last summer, while Twitter was struggling to keep its servers running consistently, a number of rivaling microblogging services like Plurk and Rejaw arrived on the scene, ready to capitalize on the imminent exodus of Twitter's disgruntled users. Twitter, however, was able to turn its fortunes around and is now just about as stable as any other online service. It is also growing at an impressive rate and has become the de facto standard for microblogging in most users' minds. For Twitter's competitors, however, this has meant that there are fewer users to go around, and today, Rejaw announced that it will shut down its servers on May 31st.

BookGlutton, a site launched in January 2008 to allow socially-enhanced online book reading, has just launched a nifty little widget. Now, blog and website owners can embed what amounts to a book club just about anywhere.

I tried it out on my own blog website (note to WordPress.com: please make it easier/possible for users to embed script widgets, kthx), and it's pretty tight. Once the user clicks the widget, they can read the book page by page, skip around chapters, chat about it with other cross-platform readers in a slide-out on the left, make comments (public or private) on specific passages in a slide-out on the right, and (for veteran BookGlutton users) even choose from a drop-down menu of groups for further reading.

We already know that the iPhone has quickly become one of the most important mobile platforms, and today, O'Reilly's Ben Lorica took a closer look at the developers behind the most successful applications on the iPhone. Currently, the App Store features about 40,000 different apps, and on average, a typical seller or developer will have about 3.42 apps in the store, though these numbers are somewhat skewed by a few highly prolific developers who publish a lot of apps that are relatively easy to create.

From HP's Social Computing Lab comes news of Friendlee, an entirely new kind of social network that focuses on the intimate connections between close friends, family, and colleagues. The application, designed to operate on your mobile phone, tracks your call and messaging history to provide an ambient awareness of who your "real" friends are and then adds those people to your social network. Not only that, but Friendlee also tracks the businesses you call frequently to identify your preferred services which can then be used as recommendations to your network of friends.