I had a chance to try that Compgeeks Tualatin adapter today...
It doesn't work for multiple reasons. FOr one, it won't physically fit into the socket, good ole ECS positioned those caps above the socket too close, I had to get out the soldering iron to get a little play in their leads, back them out of the board a bit so I could bend them backwards.
After getting the adapter into the socket, I found that the USB keyboard would cause the system to hang immediately upon entering the BIOS setup. That didn't make much sense to me, but sure enough, when I changed to using a PS/2 keyboard, I could then enter BIOS setup, navigate around without lockup. Then there were more oddities, like hanging on POST if the multiplier was set to "Auto" (or "default", whatever), but if multiplier was set to 11X it would progress a bit further, would load the windows boot splash screen then immediately lock up. Reducing FSB speed, changing around the slotket jumpers, and most every other adjustment I could think of either caused an earlier lockup or finally a lockup at windows boot splash screen (same as before). A bootlog didn't turn up anything revealing.
The last attempt was with the FSB set to 100MHz, multiplier to 11X (which was correct, it was a 1.1GHz Tualatin Celeron), and this resulted in the system failing to POST, only beeping. After resetting CMOS it STILL would only beep, would never again POST with the TUalatin installed even though it had ALWAYS POSTED at every setting prior to that. I had a sinking feeling that i had damaged something, but went ahead and reinstalled the original Celeron 700 and it POSTED finally, and apparently I had successfully cleared the CMOS since all defaults were then loaded. I just hope I didn't fry the Tualatin CPU, but I suspect not.
Both original/oldest and newest BIOS versions were tried. There seems to be an immovable problem with using a Tualatin, or at least with the particular adapter I have. I also tried the jumper next to the CPU socket, between it and the memory, and saw no difference.