This should be FCPGA370 or mFCPGA370
No, "m" means mobile chip. Socket 370 is not a mobile chip.
Afaik the m in mfcpga means micro
FYI, after a little reading it looks like the Tualatin was actually the first unofficial micro cpu. The first official micro cpu's started with the mobile PIII and Celerons. That is probably why I got the two confused :-)