According to IGN, Telltale is "targeting" its launch of Jurassic Park: The Game for November 15th.  Instead of their usual one-episode-per-month release, every episode will be available right away for PC, Mac, and PS3.  The version for Xbox 360 will only be available via retail disc.

An iPad version is being planned, but for whatever reason it will be released episodically starting on a date other than November 15th.