QUESTION: Does YDL run on all Sony PS3 models?

Yes.


QUESTION: Does YDL come pre-installed on PS3s at retail stores?

No. As an end-user of the PS3 you may install YDL on your PS3. This is a relatively simple, painless procedure.


QUESTION: Is PS3 support for Linux improved over that of the PS2?

Definately. Sony has designed the PS3 to run Linux. Your experience as an end-user will be optimal.