Hi Steve.
Wow, good deal for your PIII.
I have finalized the spec of my HTPC. But money is tight right now.

I'm just waiting for my next paycheque or 2.
I'm still going with the Mini-Itx hardware. I'm going to be getting the
EPIA MII-12000 (Equivalent to Celeron 1.2Ghz). The only place in Canada that sells it right now that I can find is at Koonline.
http://www.koonline.net/detail.aspx?ID=213
For some reason, this MB/CPU is hard to find in N. America. They are easy to get in Europe however.
The case I'm going to get is the Silverstone LC-06 or 05. This is my 2nd choice behind the Hoojum cube but its half the price. It should look good in the living room.
http://www.silverstonetek.com/products-lc06.htm