Documentation from the 11:11:11 UpStage Festival is compiled here; a show-reel featuring excerpts from all the performances has been made, view it on vimeo

https://vimeo.com/45892124

below are some images and recordings.

Osprey Therian links to the first bits of documentation from the Second Life Node:

Exchange Radical Moments: announcement of the UpStage festival at 9m in this recording of a live broadcast: http://bambuser.com/v/2115876

Images from the 11:11:11 UpStage Festival (click on the thumbnail to see the full size image):