I have been to the new ones at Elm Creek, where are nice. the flow nice, not real technical. would be a great trail for those of you wanting to get into mtn biking.
I have heard a few people have like the beach right there at Carver, could do some brick or xterra training
Ride report: I thought they were a blast. Gave me stuff to practice, without being overwhelmed. Also good for the "good" MTB folks who can whip up some nice speed and try not to kill themselves on the switchbacks. Stuff for all levels, really. :-)