Developer Mathieulh has released a handy tool called PS3/PSP Retail PKG Decrypter & Extractor for Windows. This tool can be used to extract "extract Playstation 3, Playstation Portable and mixed GAME PACKAGES".
Mathieulh just informed everyone that the PS3 key list has been updated. Some of the keys that were missing a couple of days ago are now added to the spreadsheet.