I just committed Firefox 3.0b2 to the buildservice and it will show up for download during the day. (The buildservice is currently loaded with a Factory update so it might take several hours :-().
It’s still for testing purposes only! (While I haven’t seen any feedback about b1 yet and this post has been created using Beta2).
Another thing people might be interested in is that this version and also Firefox 18.104.22.168 from the buildservice repository contain a searchplugin for openSUSE software search. Just choose it in the search box.