You can view a gallery of the photos here:
The venue recently had new LED lights installed so I decided to give it a try with the GF1. I was able to shoot at 800 and 1600 ISO and other than some trouble with blown magentas and blues (LEDs are tough to shoot), I'm pleased with the results. A friend was shooting right next to me with her 5D mk II and I don't know that hers were any better (in terms of overall IQ).
For those that are interested, I shot most of these with the 20mm 1.7, a few with the 17mm 2.8 and the EVF. Since I usually haul around the 5D and a couple big lenses, it was nice to have just the GF1 around my neck and the spare lens in my shirt pocket.