PSN Link Database either so if someone can post the link I will +Rep ya too!
Although I can't confirm it (need to read around more), a few sites are reporting that end-users will not be able to make them yet as an SDK is required.
If this is accurate, then we'd have to wait either for Sony to release an updated PS3 Theme app or for one of the unofficial PS3 Theme creator app authors to study the format and update theirs. I will post more details as I find them...
Agreed, currently it hasn't been submitted to the