When TweetDeck landed in the Chrome Web Store, it seemed like an indication that it might eventually evolve into a pure HTML5 Web app. Now it looks as though that's exactly what's going to happen, with TweetDeck announcing that a new, not-just-for-Chrome Web client is ready for beta testing.

It's a natural progression for TweetDeck, especially since its originally Adobe Air app is practically all Web code. TweetDeck Web will sport a feature set which is nearly identical to the Chrome app, with the notable exception of Twitter streaming.

Initially, TweetDeck is targeting Firefox 4 and 3.6, Google Chrome, and Safari. Opera and Internet Explorer 9 won't be invited to the dance until a bit later on.

If you'd like to get in on the TweetDeck Web beta, head on over and register -- or sign up using your existing TweetDeck account.