Good thing Mobile Crunch has consolidated all you should know and everything you should try after you unplugged your cable from an iTunes update. The guys at MC posted the 20 things to check out for your new iPhone OS 3.0.
Read iPhone OS 3.0 Just Launched. Here are 20 Things To Check Out
Read Apple Releases iPhone OS 3.0 for iPhone and iPod Touch
Read How to get the iPhone 3.0 firmware update onto your iPhone
Goto iPhone OS 3.0 software update