One shop in Akihabara starts Opteron demo!
http://www.watch.impress.co.jp/akiba...elonademo.html
They use Tyan n3600M + Opteron 2347 x2.
...I must go there tomorrow

BTW, I've just read an official K10 Revision Guide:
http://www.amd.com/us-en/assets/cont...docs/41322.pdf
This guide describes only "DR-BA" and "DR-B2" revisions.
So, CPU-Z should shows "A" as stepping value in case of "BA" revision,
and "2" for "DR-B2".