I have found two pretty good resources on this board. One indicates that the 1800+ chip is the highest AMD XP processor that this board can handle. The other side indicated that the board can handle a processor that runs up to 1900MHz. Since the 1800+ processor only runs around 1530MHz, this would indicate that you can put in a faster chip.
Personally, I wouldn't go above a 1800+ on this board...and especially not a 3000+.
-Mike