Fennec is really nice albeit slow. I really like the way it zooms and reflows mobile sites like the android browser to make them readable. I also like how that, with the exception of text entry it doesn't ever require you to leave portrait mode. If Opera could do anything other than fixed zoom, I'd probably be bringing it up too. I'm still waiting for one that properly supports whatever it is that makes the android/iphone gmail site work (HTML5?).