This collectors edition will include an artbook, a flash drive loaded with the original Starcraft and Brood War expansion, the Wings of Liberty Soundtrack, and much more.
See the Blizzard Press Release for more details.
UPDATE
The Starcraft II website has been updated with pictures and details about the collectors edition features. Check it out here.
Edited by Gfire, 09 April 2010 - 05:12 PM.