Sure, there's a lot of to love about the open-source, Android-powered T-Mobile G1, but Google's Andy Rubin just confirmed what might be the new handset's killer app: push Gmail. While that's not a first, it could be a major differentiating feature for Android phones here on out, since it sounds like the app is advanced and partially web-based: it has the threading, search, and Google Talk presence features of the web client. We'll let you know more as soon as we find out.

The T-Mobile G1