If you use a Windows Mobile device, I hope you've tried Skyfire. It's probably one of the best mobile browsers currently available. I think it beats Pocket Internet Explorer, Opera, and Iris. I say this because you rarely run into a "out of memory" error using Skyfire (although you may not get this problem if you use a different phone. I've only tried it on my XV6800).
Skyfire is still in beta, but the most recent version adds social networking Web 2.0 features.