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Researchers at the Palo Alto Research Center (PARC) are developing a new Twitter client application that aims to derive meaning from the next-ending influx of tweets. The application, called "Eddi," automatically groups tweets for you into topics mentioned either explicitly or, unlike most Twitter clients that also provide topic browsing, implicitly. The end result is a Twitter app you can use to quickly find the popular discussions within your own personal Twitter stream, either by search, tag cloud, timeline or category list. It even suggests tweets you might be interested in reading, helping you sort the signal from the noise.

The Website Taste Predictor is a new Twitter tool that analyzes your Twitter account in order to recommend websites you would like. The project uses Twitter's OAuth authentication protocol to access your Twitter account so you don't have to enter in your username and password in order to try it out. How exactly it works, we can't say. There's no "about" page, "FAQ" or other explanation. In fact, there's not even a credit as to who made it, only a URL. But the URL is a big hint: it's hosted on the MIT.edu domain underneath the subheading ~peretti. And just who is ~peretti? Only the co-founder of the Huffington Post and the viral tracker BuzzFeed, Jonah Peretti.

Twitter is asking you, its users, if you have 140 seconds to answer seven simple questions about its service. Now, in calmer times, a simple user survey might just pass by unnoticed, but with all the hubbub over the past week about Twitter buying Tweetie, Fred Wilson's over-analyzed blog post and the unveiling of Twitter's ad platform, everyone's looking for clues as to Twitter's next move.

One of the best ways to find out who to follow on Twitter is to find someone you really find interesting, look at who they follow, and go from there. Taking that same idea, Twitter app store OneForty, which we dubbed one of the top ten startups of 2009, will start offering today Twitter application "toolkits".

The toolkits are user created lists of their most used, favorite apps that either manipulate, add on, hover around or otherwise interact with Twitter in some fashion.

Are you suspicious of those sexy avatars and "marketingbizpro" accounts following you on Twitter, but don't have the time or inclination to block and report them one by one as they pop up?

We've just found a new, completely free app that will zap those bots and bad users in just one click. It's fully customizable, so you can tell the blocker what you personally consider to be a spam account. And you can choose to simply unfollow those users, block them or report the accounts to Twitter, as well - again all with just one click. StopTweet is definitely one of the more useful apps we've seen lately, and it also helps us all do our part to clean up the Twitter universe.

Seesmic's announcement of Look, their brave new Twitter client, had the tubes positively humming yesterday.

Although it might be a great interface for newbies, that app isn't recommended for power users. But we just found one that is - for desktop use, anyway. It's an agile bit of hotness that's as responsive and unobtrusive as you'd ever want, and it can also provide you with a stock-ticker-esque UI that will satiate all your info-social needs. Meet SocialVisor - the Twitter app.

Amid rumors and artifacts of Twitter's testing accounts managed by multiple users, we've found a startup focusing on precisely that problem.

The biggest and perhaps best known competitor in this space is CoTweet, a truly enterprise-scalable solution for Twitter accounts with multiple users.
It's well-suited to brands or news organizations in particular, but BirdHerd might provide a low-cost alternative for small- to medium-sized businesses or other groups.

Have you ever wanted to share a set of memories with some of your Twitter friends, keeping the content private while still allowing for collaboration between certain folks?

It's not anything we thought we wanted, either, but after playing with TwitAlbums, we find the concept charming. Here's how it works: Using Twitter's OAuth function, users log in and create collections or "albums" containing multimedia content and text comments. They can invite whatever users they like to join them in adding files, and only the users they invite can see the content or comments. Best of all it looks like this little app already has a monetization strategy in place.

We have profiled Twitter-based file sharing services in the past, but in some cases the shared files were read-only and the UI design left much to be desired, or the service merely redirected the user to a third-party file sharing service.

Spain-based Ideateca has conquered these drawbacks with FileSocial, a sleek multi-platform file sharing service for Twitter. After authenticating their Twitter account, users can upload any filetype up to 50MB, add a message of 110 characters or less, and FileSocial will post the tweet on Twitter with a link to the file.

After months of breathless anticipation, the waiting world can now catch a glimpse of oneforty, a collection and curation of the Twitter third-party app universe from consultant and Twitter for Dummies author Laura Fitton (@Pistachio).

From TwitPic to HootSuite and everything in between, oneforty is a 1,300-apps-and-growing marketplace that includes descriptions, screenshots, links, reviews, live Twitter commentary, tags and more. Read on for details and, if you're one of the lucky 140 first readers, a beta invite.