I got out there yesterday. It was great to have nice dry trails to ride (my local trails are still drying up).
There have been a lot of changes to the Orange and White trails at Muir. I usually don't ride those (I usually do the blue, connector, and Carlin trails), but gave them a shot yesterday and they're pretty nice. There's now a whole lot more options for making your own routes through Muir now.
Warning: may contain sarcasm and/or crap made up in an attempt to feel important.