Bongobeat, The E3110 ( part DW472  for the processor alone or part P694D for the service kit) is the only processor you had listed that is currently showing as supported in the T100. None of the C2 Duos are showing, nor is the X3320, there is an X3220 and an X3330 though.  Hope this helps answer your questions.
Is the Xeon X3320 (Yorkfield, 6M Cache, 2.50 GHz, 1333 MHz FSB, LGA775, 95W) supported by the PET100? I want to upgrade the CPU and my options ($) are the E3110 or the X3320. And about the C2Duo E8400, the C2Quad Q8400 or the C2Quad Q9400? If I can upgrade to one of them (less expensive) I can invest on another RAM stick...
PowerEdge T100 and Xeon X3320