Domainers do tend to get desperate when it comes to poker. It's pretty simple, but all the good names (and a large part of the bad ones) are gone. Obviously poker.com will do very well, but POKERPOKERPOKERPOKERPOKER.com, which is also registered, is going to get very few visits.

There has been a huge craze about poker, and I admit that even I have made a good deal of money from poker related PPC. If poker names are getting attention now, it is a bit late for the prospective domain buyer (unless they are willing to spend in the thousands of US$ for a good name).

I would like to add to goodkarmaco's note here:
POKERPOKERPOKERPOKERPOKERPoker.com is available.