Better Gmail Extension

I use GMail for email, Google Reader for feeds, and Google Calendar as my organizer. Yeah, I'm Google's bitch. I recently discovered this Better Gmail extension. It doesn't have that much useful stuff. The one thing I find really handy is the integration of Google Reader and Calendar into the GMail sidebar. I no longer need 3 Firefox tabs open for these apps. It kind of takes up a lot of screen real estate opening up Reader and Calendar in an frame within GMail but with more javascript hacking this could be improved even more. Maybe Google will more tightly integrate these apps now that someone else has done it as a proof-of-concept.