Comic-Con 2009 attendees were recently treated to a first viewing of The Guild’s video, “Do You Wanna Date My Avatar?” which was co-written by Felicia Day and Jed Whedon. The video got many fans even more excited for the release of the new season of the popular Web sitcom. Good news — the wait is over.

On August 24, Season 3 of the Web sitcom The Guild premiered on Xbox Live for Gold Members, and on September 1, the episode (entitled “Expansion Time”) became widely available on MSN. Episode 1 features a guest star that Star Trek fans are sure to spot right away. (Hint: The special guest is on Jay Garmon’s list of 50 ubergeeks to follow on Twitter.)

If you aren’t familiar with this online show, TechRepublic’s Mark Kaelin provides a nice overview in his post about the launch of Season 2: “The Guild is an episodic Web-show about the adventures of a misfit group of MMORPG players, both inside their game world and out here in the ‘real world.’ As an accomplished (she might even allow addicted) game player, Ms. Day’s scripts reveal an intimate understanding of the MMORPG psyche. These insights give The Guild depth, breadth, and make it pretty darn funny too.”

According to the WatchTheGuild site, Episode 2 of Season 3 will be available next week. (Seasons 1 and 2 are posted on the WatchTheGuild site.)