Runic Games Forum is full of similar posts from impatient people who think that Runic misses/has already missed the best release window for Torchlight II. Curiously though, neither Runic or real fans of Torchlight are concerned at all.
Both Diablo III and Torchlight II are just fillers while waiting for Borderlands 2.
Well, Daedalic Entertainment, a company that will be releasing the retail version of Torchlight II in Germany (and in whole Europe I suppose), has a release date of 13.12.2011 on their website. Here's the link: http://www.daedalic.de/de/game/Torchlight_II
This is what one of the Runic employees had to say concerning the abovementioned release date: "If you don't hear it from Runic, then don't read too much into it."