<< I've just read Shuttle AK31 rev2 at ViaHardware.com, it looks good but it's using KT266 new revision. >>
What you mean but it using the KT266 chip? The new KT266 motherboards are beating out the Amd761's for the most part, See a review of the K7T266 at Dw3d.com. Anyway, back to the subject, yes the Ak31 does have 4 like statix said. I have't seen any others that will have 4 though, most other KT266 motherboards have three, K7T266, 8KHA, and so on.