Various gaming news sites have reported that Chris Vrenna, of Tweaker
and some other band, will be performing at E3 in support of the Tabula Rasa
[V]isitors to the booth will see the high-energy performance art and percussion beat of The Mutaytor playing the music of Tabula Rasa, in scheduled performances throughout the three-day show. There will also be performances by Chris Vrenna, of Nine Inch Nails fame, and Clint Walsh, composers of the Tabula Rasa soundtrack.
I think E3 is an invite-only event, so good luck getting in.