PS3 now offers programming tools to its users [C, C#]
Just got an email from sony.
Move.me | PlayStation Move | PlayStation®3 System - PlayStation.com
Shell out 99$ and you can be programming on the PS3 without the need for a custom firmware!
Though with this release. I can almost guarantee us seeing homebrew in the near future on the latest firmware.
Edit:
For those of you in college.
Put your info into there and get a free voucher to download it.
If they provide it in the form of a redeem code, Sell the code on ebay for 30-60$ (Seeing as they would normally have to pay 99$)