ecc/r memory is pretty much reserved for server MOBOs
I am 99.9% sure you will wait for ever to find one.
Yes, there are plenty of high end server boards. The dual or quad core opteron is
far out, with 24 cores and 256GB of ram. I am seeing new motherboard announcements every day for the x6 .. it seems likely that it will also be used in server boards soon.
Anyway, I am going to wait a bit before going with the opteron.
The really funny thing is that the ecc/r dimms are significantly cheaper than the non ecc/r
dimms, so there is no monetary motivation for not using them.
E.g. $615 for 16GB of ddr3 1066 ecc/r versus $762 for 16GB of non-ecc ddr3 1066 dimms.
So if the ecc/r motherboard costs less than $147 more, it is cheaper to use the ecc/r memory.