Yes, the machine can physically contain ECC RAM, that much I know. The question is, is ECC on and active with the Celeron processor option?

Memory

Architecture 1066 MHz or 1333 MHz DDR3 unbuffered Error Correcting Code (ECC) DIMMs
Memory module sockets Four 240-pin
Memory module capacities 1 GB, 2 GB, 4 GB, or 8 GB
Minimum RAM 1 GB
Maximum RAM 32 GB

http://support.dell.com/support/edocs/systems/pet110II/multilang/GSG/DAO_BCC/T110da.pdf

All Dell servers require ECC memory ... some unbuffered (UDIMM), some registered (RDIMM), and some fully-buffered (FBDIMM).

"Does the PowerEdge T110 II server have ECC support?"

Yes (see my other post).  ECC memory is not only supported, but required.  (This seemed to be an actual question in your initial post.)

"Is ECC support available with all the processor options?"

There appear to be no current Celeron's that do support ECC (can't explain the absence of spec though):
http://ark.intel.com/compare/?ids=27164,27165,27166,27167,27168,27169,27170,30543,27172,27173,30544,27174,27175,27176,27177,27178,49932,27179,27180,27181,27182,33102,49933,27183,49934,27184,27185,27186,29734,29735,27187,29736,35239,42097,27188,27189,27190,27191,27192,27193,27194,27195,27196,27197,27198,27199,27200,27201,34440,35101,35100,34751,42770,42771,42772,42773,58667,63913,53414,53415,53416

In fact, if you are purchasing this server with ECC in mind, here is a comparison of the configurable processors ... only the E3-series processors appear to support ECC:
http://ark.intel.com/compare/52273,52271,52269,52276,53422,53480,53491,53414

I'm guessing ECC is simply ignored by the memory controllers on non-supporting processors ... or manipulated by the BIOS.

I guess I shall order the server and see. ECC isn't a showstopper feature, just something that's really nice to have. Thanks for your help and I'll follow up on this post once I receive my server and run tests on it to determine if ECC is active. :)