A petition seems sort of useful, at least to get the ball rolling, I guess. It would be nice to have Google put more people on it.

But it seems worthwhile to note that if you don't like Chrome's accessibility, you can do something about it yourself. Google Chrome is just a corporate-branded release of Chromium, an open-source project that anyone can contribute to - and Chromium has had a call out to work on accessibility for a while now:

http://www.chromium.org/developers/design-documents/accessib...

Nothing like diving in and getting our hands dirty, eh?