When I go to buzz.google.com from an Android phone I get redirected to a Mobile Help page listing the supported phones. Is this happening to anyone else?
[edit]
It looks like only Android 2.0+ is supported and the HTC Hero still runs 1.5. Lame.
If you use the mobile UI and have someone comment on your post, it will send the thread to your inbox. Trying to reply to that thread will then force-update your gmail to include Buzz (or at least, it worked for me.)