My iPhone feels like it's on fire when I try to charge it

If you are still under warranty, call Apple to have it serviced or see your nearest Apple Store and show them your phone.
Is it getting hot when you use USB connection or the adapter?

My first iPhone did the exact same thing! Make sure you have your mail set to push manually. Your wifi is off when not in use and that Safari is not running in the background. These things are big battery wasters. Make an appointment with a genius if you are still within your first year of owning your phone.
I took mine in, they hooked it up and within 5 minutes I was getting a brand new phone. Apple is awesome about backing up their product during the first year. Oh by the way, that second phone they gave me had the ring silencer break off not
Good Luck!

You may have a stuck app. Try resetting your iPhone by pressing the home and sleep buttons until you see the Apple logo, ignoring the slider. Takes about 5-15 secs of button holding and you won't lose any data or settings.

If this doesn't work, restore as new, not from a backup and then resync all your stuff. That worked well for me with 3.0 problems.

Message was edited by: paulcb