The 30-day exclusive negotiation deal with D. E. Shaw to buy the Riviera expired and the deal is apparently dead. Stockholders felt the $21 a share offer was too low. L.V. Review/Journal article and scan:

http://www.reviewjournal.com/lvrj_home/2006/Dec-14-Thu-2006/business/11408873.html

Also a L.V. Review article on the status of the Harrah's take over.

http://www.reviewjournal.com/lvrj_home/2006/Dec-14-Thu-2006/business/11413887.html