(You can read Trekmovie.com's report about the show's plans right here.)
Earlier this week on Twitter, Mythbusters team member Grant Imahara reported that the episode featuring this project has been set to air on Monday, December 28th:
@grantimahara Confirmed! The #GornCannon episode is going to air Monday, 12/28/09. And I will be live tweeting thru the @Mythbusters acct...
3:03 PM Dec 13th from web
Trekkies, set your DVRs!