> And what happened with the Cell ? it's used in a PS3 and that's it ?

No, that's not it:

http://www-03.ibm.com/systems/bladecenter/hardware/servers/qs21/
http://www-03.ibm.com/systems/bladecenter/hardware/servers/qs22/
http://www.lanl.gov/roadrunner/ (using the above)
http://www.mc.com/microsites/cell/products.aspx (several boards and systems)
http://us.fixstars.com/products/gigaaccel/
http://www.fixstars.com/en/products/gigaaccel180/ (same as above)
http://www.matrix-vision.com/products/cell/mvxcell8i.php?lang=en
http://www.toshiba.co.jp/about/press/2009_01/pr0701.htm (upcoming "Cell TVs")
http://pro.sony.com/bbsccms/ext/ZEGO/ZEGO.shtml (upcoming, press release, brochure)