With the Thoroghbred bios update..u should have no problems running the 2200+, 2400+ and 2600+....so technically speakign the 2600+ is the fastest one you can run...dont expect to run a 2700 or 2800+ as they use the new 333Mhz FSB..well ig uess you COULD run them...but ud have to do the multiplier trick with the L1 bridges or just simply overclock ur FSB to the desired speed....even though the chipset MAY or MAY NOT handle it =)
<A HREF="http://www.anandtech.com/mysystemrig.html?id=13597" target="_new">-MeTaL RoCkEr</A>