I have been using an ASUS CUSL2 for a long time, and I must recommend it.
It's easy to overclock, and uses a helluh-stable Intel i815E chipset. You can add up to 5 USB ports, for a total of 7.
It has 3 SDRAM DIMM slots, and can hold up to 512 MB of PC133.
No, I do not work for ASUS, nor am I paid to promote their stuff. I just like the board.
BTW, how did you get a free CuMine?