Keeps restarting, running out of things to try :(

My iPhone froze up earlier tonight, after holding power and sleep to restart it now all it will do is come up with the apple logo, sit there for awhile (probably 5 minutes or so) then restart. Sometimes the loading 'wheel' displays half hidden under the logo. I have tried restarting it, restoring from iTunes, putting it in DFU mode then restoring from iTunes, restarting it without the SIM card in, and putting it in DFU mode then restoring to the 2.2.0 firmware from iTunes (it was on the latest). Nothing has worked. This phone has never been jailbroken, never been dropped, gotten wet, etc... I am really hoping it's not hardware as it's no longer under warranty and I can't afford $200 for out of warranty repair if it is. Any help or ideas would be greatly appreciated.

1) Power off the iPhone by depressing both the sleep/wake button on the top of the iPhone and the home button. Wait for the iPhone screen to turn black aka screen-off.
2) Depress the home button and connect the iPhone/iPod sync cable into the docking port on the bottom of the iPhone at the sametime without removing the home button.
3) You should be able to see the Apple logo coming up on the iPhone and then the recovery screen with be shown after the Apple logo:
4) iTunes will start and inform you that it has detected an iPhone in recovery mode and you should restore your iPhone to start using it.
5) Perform your firmware restore.
7) Re-sync your phone to add back all your data and apps.

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    And if that doesn't work, I would reset the device:
    Resetting your device
    Press and hold the Sleep/Wake button and the Home button together for at least ten seconds, until the Apple logo appears.
    via: iPhone, iPad, iPod touch: Turning off and on (restarting) and resetting
    http://support.apple.com/kb/HT1430
    Welcome to Apple Support Communities!
    Have a great day,
    Delgadoh

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