BlizzCon (a gaming convention coming to Anaheim at the end of October) is offering tickets at a good rate and there is no requirement that you be registered for the conference.
Details in the last Park Update at MousePlanet:
http://www.mouseplanet.com/parkupdat.../dlr050926.htm (It's the third item).
The important thing to note though, is that the tickets won't be shipped until October 19.