If your mobile phone is not Android or iPhone… or your gmail still does not have Google buzz folder, you still can get into buzz, albeit only mobile version. Use Firefox extension – UserAgentSwitcher. Choose iPhone3.0 profile, go to buzz.google.com.
You can also buzz from symbian (and I presume winmo, although I haven’t tested it) goole maps (v.4.0) which was updated yesterday on google servers. Works on Symbian s60v5.