I’ve been hoping to try out Google Buzz, but it hasn’t hit my Gmail account yet and it won’t run on my phone*…even though it’s a web app. Comments at Android and Me and at Mashable show that I’m not alone.
The support thread mentions that they are “working on another version that will make Buzz for mobile accessible on older Android OS versions (and some other smartphones as well).” The browser in Android 1.6 and below supports similar capabilities through Gears, so they may be planning a Gears-based workaround.
This would be a lot less of an issue if it weren’t for the fact that most of the Android phones out there still run 1.6 or even Android 1.5. IIRC only the Droid and Nexus One have officially been updated to 2.0 so far**, so unless you have one of those two models, you’re more likely to get Buzz to run on an iPhone than Android.
*I’ve got a G1. It can only access Buzz through the updated Maps app, which brought up a bunch of people in nearby office parks posting things like “Testing Buzz” and “WTF is Google Buzz?”
**A few other phones have had updates announced, but I don’t think any have actually shipped yet. I could be wrong.