The May edition of the Robot Competition FAQ is online. A total of 57 events are listed. There are 5 robot competitions in May - 6 if you count BattleBots R/C vehicles as robots. The most well-known event this month is the SAE Walking Machine Challenge which will be May 3-5 in Aguascalientes, MEXICO. If you're in the area, be sure to check out this event as it almost always has some of the most interesting and unusual robotic creations of the year (Caliban, a 24-legged walker, was designed for a previous SAE Challenge).