i like poker.com for the number of freerolls that it offers. a lot of forums also have private tournaments there. i just opened a real money account and received a free 3k freeroll coupon. it is also very easy to acquire the required raked hands to qualify for the $500 and $3000 daily freerolls. the higher freerolls have a lot less people than the 1000 entrants for $100. the play is much better also because there is a better payout to compete for. not as many all-ins all the time.
You can win a trip to OZ in January next year for an investment of ZERO bucks....win the Aussie Freeroll and that weeks Sunday Qualifier and you are off on a trip to OZ all expenses paid and entry into the Aussie Millions, held in Melbourne.
I took first in the $200 Freeroll and got $50 and a blue ribbon on my placeholder.
I then used the winnings to earn a coupon(easy to do) to the $500 Freeroll (actually lots of the $500 and $3000 Freeroll tourneys)where I placed and took home $40