Led Zeppelin will throw an after-party following its much-anticipated London reunion show, and will invite several unsigned bands to play the gig.

Interested acts must upload a video to Comcast's answer to YouTube -- Ziddio.com -- explaining why they should get the opportunity. Winning acts will be introduced by Led Zeppelin themselves, and must play one Zeppelin cover tune and one original track for the crowd. The contest will take place the entire month of October.