PS3Hax member ricardopvz has released ports for PSGrade for Arduino Duemilanove/Mega. If you have been under a rock for 24 hours, PSGrade is a new method to downgrade your PS3 and enter it into service mode. Please see the various news posts related to PSGrade before attempting to do it.
Welcome to PS3Hax, your official PS3 hacks, PS3 Homebrew, and PS3 Downloads scene. Check back daily to keep up with the latest PS3 Hacks and drop by our forums for more PS3 Hacks discussions.