For people having issues with 3.0 being sluggish... I'm willing to bet you restored from a backup when you updated rather than updating to a new iPhone. Restore your device and select set up new iPhone... your issues will go away. Promise.
I swear I asked you this once before when I un-did my jailbreak...SO please excuse me asking once again.
My phone is a bit sluggish since I updated...thought I'd give your suggestion a try.
If I set up as a new iphone, will I have to re-set all my preferences manually in the iphone again? Is there a way to just sync with iTunes and restore my preferences, music, etc?