I personally use Ubuntu on my PS3, because i am used to using it on my computers, and i like it. It runs fast(ish) but i dont believe it is possible for WiFi on ubuntu as of yet.
I have used yellowdog as well with the WiFi enabled and i was not impress by the performance of the actual OS, it was slow and it was crashing quite alot.
Ubuntu for me, it is hard to get running though.
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