The only non-PS3 consumer application of the Cell that I know of is in some Toshiba laptops like this one:
http://www.xbitlabs.com/articles/mobile/display/toshiba-qosmio-f50_5.html#sect0Heck, used more than I thought: "Besides Toshiba’s Qosmio F50, G50 and G55 series notebooks, the SpursEngine can be found on standalone PCI Express cards offered by Leadtek and Thompson as well as in the new 42- and 46-inch TV-sets Toshiba Regza."
Not much more info:
http://en.wikipedia.org/wiki/SpursEngineBut just to reiterate what everyone else said, it ain't easy to program fer and it don't like running an OS, really. It has one generic PPC core and then 7 vector units and you really really have to have stuff that is highly parallelizable to wring the best performance out of it. It took the PS3 crowd several years to do so for games.
