I believe the trails through/around the Angora burn area are going get some love this summer too... so keep an eye out for volunteer opportunities. Some really fun casual riding back there... and a few good boulders too.
A great trail is still going in at Sky Tavern. Log berms, pavers, some large jumps and drop offs were there by last Fall. Should be great once Mt Rose adds the bridge across Hwy 431. My neighborhood kids had some great doubles and berms up near Galena in the National forest until the rangers tore it apart.
I know some of the rangers (or more likely trail crew) that have to tear those down. Believe me, most of them are bummed when they have to do it. As far as I'm concerned, as long as they have proper erosion control measures and don't involve destruction of vegetation (other than white thorn), they should be allowed... but I don't make the decisions.