Not sure if you are looking for this kind of feedback, but UI critique: I kept trying to click the light blue text, thinking it was a link. In fact, my assumption was finally validated, but only at the very bottom 'sign in with your Twitter' link.

I also agree, you should just stick the public stream (or an abbreviated version of it) on the front page, there should be no steps required to get a taste of how things works. At the very least, a screenshot of how it looks on the front page...need something to entice me to log in.

Once I logged in though, yes I dig it. I like that you can retweet from within the interface. The UI is simple and works quite well, push that out to the front page!