Is side chat disabled on Dallas 20? I tried joining to see if I could meet up with some NCR folks, but I couldn't actually communicate and I didn't see anyone else talking. I'm going to try and see if restarting my client works.
I'm liking the new zombie densities as well. I can finally raid the barracks at the NW airfield, because the zombies act as a sort of buffer for groups that tend to be trigger-happy, but solo I can sneak in and out pretty easily.