At the start of 2011, UNO kicked off its 40th Anniversary with a float in the Tournament of Roses parade, Now, UNO is bringing fans together once again, and keeping the 40th Anniversary celebration going with the 40 Days of UNO Facebook Tournament. This tournament offers fans worldwide the opportunity to test their UNO skills and even enter to win more than $40,000 in prizes.
Here’s all the tournament and sweepstakes info:

The 40 Days of UNO Tournament will launch on Facebook August 15th, and players can enter the UNO Play, Enter, Win Sweepstakes to win hundreds of prizes totaling over $40,000 (U.S. residents only).
How to Play:
The 40 Days of UNO Tournament will be divided into three stages, narrowing the 10 million anticipated players down to the top four based on a points system. Each time players log on to Facebook and play in the tournament, they earn entries into the UNO Play, Enter, Win Sweepstakes*.
Three leader boards will display players’ standings in relation to their competitors worldwide and their respective country, as well as within their Facebook community.
*Up to 10 entries per day per person.

Tournament Timing
Stage One: Aug 15, 2011 – Sep 5, 2011
Stage Two: Sep 9, 2011 – Sep 18, 2011
UNO® World Champion Final: September 24, 2011
*Tournament play will continue 24 hours/day throughout all phases
How To Enter:
RSVP now at: http://on.fb.me/40DaysOfUNO
What can you win?
Sweepstakes prizes range from iPads® pre-loaded with the UNO® game app, to an all-expense paid Royal Caribbean cruise plus $10,000 in cash.