Nope, they are still there. I lost track of them once because I was clicking on the wrong filters. I'd first check the filter at the top of the screen. Make sure you are on scheduled tournaments and click on "ALL TOURNAMENTS" so you can look and scan through all of them. If you can't find it still, the phone number for bodog customer support is at the top of the screen. It's worth giving them a call.
I just went through the tourney schedule on Bodog and as of yesterday 1-25-2011 they are not listed. I played in the Monday night freeroll but was not online last night. They have suspended these freerolls in the past when they have special promotions, hope that is the case now. They are nice bankroll builders if you can wade your way through 3,000 dummies and a couple of hundred actual players.
i called support...they said they are unavailable whlie they fix some type of problem. seems kinda funny that all the other freerolls are still available. support gave no ETA on when the 500 would be back in action.