SpaceX's Falcon 9 rocket is poised for its maiden flight tomorrow, Friday, June 4, between 11:00 and 15:00 Eastern time (1500-1900 UTC/8:00-12:00 PDT). A webcast will be available from the SpaceX website beginning 20 minutes before the launch window opens.
I won't pretend to be able to write knowledgeably about this dramatic moment in the development of private launch capability; instead I will direct you to Alan Boyle's Cosmic Log entry "SpaceX set for rocket roulette" and Stephen Clark's Spaceflight Now article "Falcon 9 demo launch will test more than a new rocket." Clark also maintains Spaceflight Now's Falcon 9 Mission Status Center. Jeff Foust Tweeted a lot of interesting information from the pre-launch press conference held this morning.
It's going to be a busy morning tomorrow!