AMD doesn't exactly get me excited, so I personally don't keep up on them. (sorry--just my opinion) So anyway, I tried to check their website for recomended mobos but their website is down, so I had no luck. (so I can't give you what AMD recomends) I say go at least with MSI, Asus or Abit (no less)
I know that these are all good, but I haven't used them to be sure: (I personally suggest MSI) --includes current prices.
MSI K7 Master-S 266 DDR 6341-S $265
MSI K7T 266 Pro r RU Raid DDR $145
MSI K7T 266 Pro 2 KT266A DDR $116
Asus A7V 266-E KT266A DDR $185
Asus A7V266 KT 266 DDR Socket A $154
Asus A7M AMD 761 266 DDR $159
Abit KG7 Raid DDR $158
Abit KG7 266 DDR $136
Something with the KT266A chipset would be good if you want DDR
Good luck!
-Mike