Items that it contains include StarCraft II: Wings of Liberty, a 176-page art book, a 'Thor' unit pet for World of WarCraft, the original StarCraft plus the Brood War expansion on a USB thumb drive shaped like Jim Raynor's dog tag, behind-the-scenes DVD, the official StarCraft II: Wings of Liberty soundtrack CD, StarCraft comic book issue #0, and exclusive Battle.net downloadable content.
This is said to be one of the best collectors editions ever, and for good reason. There’s a lot of good stuff there. The Collectors Edition goes for $99.99 and is no doubt a retail product only. The standard edition is $59.99. 
Wings of Liberty is the first in a trilogy in StarCraft II, with Zerg and Protoss campaigns to come later, after the game is released this year. So far StarCraft II is in closed beta, which just received a patch the other day, resulting in some game balancing.
It’s also been confirmed that unlike Command& Conquer 4: Tiberian Twilight, StarCraft II will be playable offline, and doesn’t require any of this always online, new DRM malarkey. You only need to activate it once with a Battle.net account. There won’t be any LAN play though .
Source:  Shacknews -  Examiner [Box Arts] -  Fudzilla