I went to a store yesterday and saw a bunch of PSPs piled up for repair/replacement. What is the failure frequency (or MTBF) of PSP (and DS if anyone knows)?

I was researching before deciding which one to buy (PSP or DS - I am actually end up buying them both in the long run), and a low MTBF will be a big negative for PSP.

Is there a site analogous to gamespot which is exclusively for PC games?