P3TBuilder v2.0 for Mac OS X is out. It supports sounds and the worx. You can grab it from
http://rebytes.vndv.com or
http://rebytes.ueuo.com. These websites are the current official sites for me. Ill let you know if Im moving to other web hosts. I also published the sourcecode.
For you linux people that was left in the cold I also published a p3t library(cpp sourcecode) that can read and write PS3 themes. Get someone from the linux community to use the library and write a program to create themes for you.