Valve's been identified as one of the attendees of Gamescom 2011 in Cologne, Germany.
Now for some even greater news.
Valve has already registered and made reservations for two booths for Dota 2 at:
Hall 4.2Gamescom 2011 is going to be held during August 18 to August 21, 2011.
Stand: G045 H044
Hall 7.1
Stand: B050 A05
Can't wait for the press release on Dota 2 there, we're going to have all the latest news here.