Update: Carbine acknowledges that more players are finding their way into the game. The developer encourages players to keep track of any lingering issues on the WildStar forums.
Original story: WildStar was set to launch for early buyers an hour ago, giving those folks a chance to jump into the game's world days before everyone else. Unfortunately for those players (including our own Giant Robots In Disguise guild), WildStar is experiencing server issues and the developers are pointing the finger at a DDoS attack.
WildStar executive producer Jeremy Gaffney posted on Reddit, "I've heard from a few folks it's a confirmed DDOS attack (real time updates, may change, fog of war, etc.). Partially handled. Servers taking in some players now, player counts rising. Ninjitsu continues."
The best suggestion for now is to keep hammering away. The early bird period lasts all the way up to WildStar's official release on June 3.