What's a good motherboard for SMP Linux

Shai Ayal asks "I'm looking to get a SMP machine for Linux. From what I managed to find on the net, there are currently only dual Pentium II motherboards for sale. Quad and up only support Xeon chips which are a bit too expensive for me. So, does anybody know of a Quad Pentium II motherboard? Also, are there any suggestions on how to get more bang for the buck (maybe 4 pentium Pros)?"