I submitted every single one of my gambling .mobis (68 in all) a couple of weeks back. My Moniker rep solicited me based on a couple that I had submitted to the last TRAFFIC auction to see if I was interested...otherwise I wouldn't have heard of it.
I set all my reserves at prices that I would be comfortable letting these go at right now -- I think they'll only become more valuable over the next couple of years, but I could live with selling some of them off now.
The good news for those who missed it, though, is that it happens more than once a year...I'm not sure of the date for the next one.