Voltaire will be appearing at the next Wicked Event - the Totally Normal Event - in Whippany, New Jersey, USA, on June 28th. The event also features Freezepop, Barry Louis Polisar (from the Juno soundtrack), and Brian from the Dresden Dolls.
More information goes on the website weekly, so if you're interested, do check back. Tickets are $20, advance tickets get special bonus, and the event is a benefit for SPARC, a nonprofit summer program for gifted kids.
Hope to see you there!