ok here is what it can take...
Intel Celeron (PPGA, 300–533 MHz)
Intel Celeron Coppermine (FC-PGA, 533–1100 MHz)
Intel Celeron Tualatin (FC-PGA2, 900–1400 MHz)
Intel Pentium III Coppermine (FC-PGA, 500–1133 MHz)
Intel Pentium III Tualatin (FC-PGA2, 1000–1400 MHz)
VIA Cyrix III/C3 (500–1200 MHz)
one of those 1.4 ghz ones would be nice