These are the chips that are sold at the World Series of Poker store at the Rio during this years world series. They were sold for 0.49 each or $10 for 20 (whoever said Harrahs was bright). There is also a grey one that I am missing

There seems to be other varieties of the set made for the home market (and sold in places like Target) - http://cgi.ebay.com/500-11-5G-WSOP-WORLD-SERIES-OF-POKER-CHIPS-HOLDEM_W0QQitemZ6238082068QQcategoryZ63759QQrdZ1QQcmdZViewItem.

The Horseshoe, just prior to the handover from Harrahs to MTR had a set of metal inlay chips with the World Series of Poker logo made. They sold them in sets of 300 or 500 in a nice wooden box - http://cgi.ebay.com/2005-World-Series-of-Poker-set-of-5-Chips-RARE-WSOP_W0QQitemZ6238721000QQcategoryZ63752QQrdZ1QQcmdZViewItem