The biggest piece of the new update is of course the wireless iTunes store. But even cooler in my opinion is that Safari is again, working with .NET 2.0 AJAX. Ok back to work on iPhone applications I could build.. hmmm.....

Update: People have been reporting the ability to listen to .wav files in email attachments. I just tried with my Vonage voice mail account, and it's not working for me. Bummer. I was really hoping that would be something that did work.