I am very much looking forward to it. I've been using the G2 (or HTC Dream or MyTouch or whatever you want to call it) for the last 8 months. Switched from Windows Mobile phones and before that Palm. Android is just so much better than WM that it makes me bitter that I wasted time with WM at all. I stuck with WM because there was an excellent Chinese dictionary software that I needed for work on it (Pleco). I had to setup an WM phone for my sister the other day and I couldn't believe how slow and clunky it was.
Of course, a Nexus One with a hard keyboard would be
For existing owners of Android phones , Android 2.0+ is much, much faster than 1.5/1.6. You can upgrade your firmware pretty easily, just check out the rooting/upgrading guides on XDA-developers.com