This was just posted on the chipper board by Ross Poppel.

NOTICE OF REDEMPTION As of April 17th, 2007, Aladdin Resort & Casino is changing its name to PLANET HOLLYWOOD RESORT & CASINO. In accordance with Nevada Gaming Regulation 12.070, all outstanding chips and tokens bearing the name of Aladdin Resort & Casino will be redeemed at face value at the Main Cashier Cage at Planet Hollywood Resort & Casino, 3667 Las Vegas Blvd South in Las Vegas, Nevada. After August 17, 2007, chips and tokens bearing the name Aladdin Resort & Casino will be of no value.

This would include Silver Strikes if you want to turn any back in.