AgentBrown - In the thread at http://www.wgt.com/forums/t/464658.aspx Icon made the following announcement:
:Hi,
Our agreement with the course has ended, so it’s no longer playable on WGT.
-WGTicon"
I haven't seen anything that specifically says the contract expired. It may well have ended because Oakmont simply didn't want to be associated with this game and it just as well may have been a breach of contract by one party or the other. Usually contracts are written with an allowance for a party to terminate a contract with a 30 day written notice but maybe this one wasn't.
The odds are high that we will never know why the contract was terminated and, if it was Oakmont's decision, how much notice WGT had.