[yakto]

"Growl for browsers." Sounds like a good startup pitch. Tough to monetize, perhaps (tiny ads?).

Boxcar is doing it for iPhones/iPads.

[jdg]

We're also doing it for every device imaginable. Just haven't launched the others yet. ;)

We do have a WebSockets API that OP could hit and write a Chrome extension against. E-mail me ([e-mail]) if you'd like access to it.