P166MMX: Not used, currently I scratch my head with it's pins.
Celeron 366 : Just lies around wishing I had a BX board so I could overclock it.
Celeron2 500 : Laptop, daily usage.
Celeron 400 : Currently being built into a linux telnet code box. I'll post pics when I'm done, it should look relatively neat.
Athlon 'Classic' w/ 3DNow!Extensions 950 @ 1000 ( fastest my board allows me to go )
Athlon Tbird 1.4ghz @ 1.4 ghz.
Oh yea, Llama most 68040 are 25 mhz, but they did ramp them up to 40mhz I think. If it's a stock Amiga 4000 it's most likely 25 mhz.