First of all, congratulations on a great piece of S/W - downloaded tonight, installed and ran - went like a dream
I am running under Ubuntu on an old Celeron laptop, and basic functionality is OK. Most of my video content is in DivX or AVI. This is automatically transcoded and rendered on the PS3, but the processor is having trouble keeping up.
What native formats are supported by the PS3 - I can re-rip the content into one of these formats to save CPU cycles.