Not yet, my brother and I are planning to just sign up during "normal" registration on Monday. We're not really picky about the trails we go on as we're relatively new to Moab (been once before). Probably just going to do a couple easy trails since we're driving 1000+ miles each there and back.
To make up for all the established roads that the BLM closed off the RR4W came up with a couple new trails for this year, Lost World (3) and Tommyknocker (4). I had wanted to run Tommyknocker but in 24 minutes the runs during the week filled up so all I got was the last Sunday run. I was surprised at how many trails filled up in the first hour registration was open. Still plenty available, though, so if you're waiting you might want to get on it a bit sooner...