Is it any official Bullet SDK for Sony Playstation Portable platform, like for Playstation 3 or Wii ? I know that there are enable ports for homebrew, but we are not interested in these solutions.
Bullet runs on official PSP devkits, no problems. No need for a port as there is nothing platform specific in there. I'm sure there is scope for optimisation for PSP, depending on how much you want to get out of it, but I have not found this necessary as yet.