Bungie drops the first bombshell of what will probably be a series of bombshells released in the near future. The Halo: Reach Multiplayer Beta is dated for May 3rd 2010. One map is given out, PowerHouse. The assumption is that this map will be playable come May 3rd. PowerHouse “Utility and economy spurred industry amidst these isolated and unforgiving badlands, but like all infrastructure facilities on Reach, this hydroelectric site…