This one is a $2k prize pot freeroll, eligible to anyone who registered through and has accrued 5 partypoints (real money players earn these when they play - check your account page for details and an explanation of how they work).
If you've not already registered then you can do so using the following link, but be aware that you also need to earn 5 partypoints before you will be eligible for Monday night's game:
http://www.partypoker.com/td/wsop_2011/wsop_2011.htm?wm=3289941
Best of luck!