One of the first things I noticed at this year's iForum was that McGraw-Hill had a booth. They were selling technical books.
What's interesting about this is that I tried to get a booth last year for BrianMadden.com to sell my books, and I was told that only members of the Citrix Access Network were eligible to have booths.
McGraw-Hill is the publishing company that publishes the "Official" Citrix-approved books written by Citrix partners. <sigh>