I installed linux on my PS3, used it for about 2 hours, then formatted my drive and returned my PS3 to normal. Althought the system runs ok, it is no where near the same as a fully functional desktop.
When I used it, it was a hassle to install, and the benifits were minimal. I'd recommend sticking with your desktop, and using your PS3 to play games/watch movies straight from the XMB.
Originally posted by marcusita: He cant install Ubuntu on his PS3 anyway, so he will have to stick to his desktop.
I know the new slims dont have the Linux functionality, but thought i'd give my experience as he may decide to get an "original" model to use linux with (I prefer them to the new slim's anyway).
I'm not sure about other places, but the older units are still widely available over here, there are even quite a few BC models available.