Want to play with Google Buzz before they get it rolled out to your GMail?
The magic of Google Chrome can hook you up.
Create a shortcut to Google Chrome on your desktop, righ-tclick on it, select Properties, and then paste this after everything in the 'Target' field:
--user-agent="Mozilla/5.0 (Linux; U; Android 2.0.1; en-us; Droid Build/ESD56) AppleWebKit/530.17 (KHTML, like Gecko) Version/4.0 Mobile Safari/530.17"
(That's two dashes before user-agent, not a hyphen. I can't figure out how to get my auto-formatting to display it properly. Also, you might need to replace the quotes with non-"smartquotes." Smartquotes are DUMB.)
Then go to m.google.com and click on Buzz. This will, however, make all pages Chrome loads behave as if you're browsing them from a Motorola Droid, so it's advisable to make another desktop shortcut with user-agent="" to reset everything.