According to Tomshardware.com (very reputable computer hardware news site) several Starcraft 2 sites are receiving what appear to be warnings that the SC2 beta will arrive soon, with the official announcement possibly coming as early as Feb 10th at the announcement of Activision Blizzard's fourth quarter results.
I'm not saying Beta might not be coming soon. But that screenshot is fake. Not only because of the typo, but Blizzard wouldn't use the Starcraft font, and they wouldn't send out an image, they would just send an e-mail.
Check out this screen grab from The Jace Hall Show...
"These are Jace Hall, Dustin Browder and the Starcraft II team, starting with straight shots and then popping bottles. But right there in the background is a hint. The StarCraft II Beta may be approaching."