My Celeron-T 1.0A @ 1.33 runs stable at 1.25v (default 1.475, I?ve tested it as low as 1.20) on an Abit VH6T.
I have the retail fan turned down with a Zalman Fanmate1 to ~ 2800rpm where it is very quiet (stock 4300). Runs ~ 32/35C idle/load. I?ve estimated the power consumption at around 23-24watts.
There aren?t that many socket 370 m/b?s still available and many of the ones on Ebay may not have Tualatin support. NCIX has a Shuttle AV18E (with Tualatin support, Apollo pro 133A ) for $90CDN. It?s a pretty decent board. Fsb adjustable up to 166 in 1mhz increments and vcore is adjustable from 1.05-1.85 in the BIOS. The only downside to this board is that the only memory tweak is from cas3 to cas2. My VH6T has more memory tweaks which makes it slightly faster.