Anyone using Google's Closure Compiler? I just tried it with a script I'm developing and it choked big time. It doesn't like things like '#target photoshop' or the 'with' keyword. I managed to get it to spit out a 'compiled' version without choking, but the resulting script wouldn't run in Photoshop. I didn't spend very much time messing with it though. It's got lots of options that I probably need to study to make it work correctly.
It did point me to a few typo bugs in my code though. I'll give it props for that.
Anyway, just wanted to find out if anyone is using it and what you think out it.