I just got my dock. The thing is built like a tank and it's very high quality. Compared to the N1 dock it's not even in the same ballpark.
My fiance isn't home right now so I can't test the LTE version but I doubt it will fit.
I have the audio out hooked up to my system right now and it sounds very good. I'm actually really surprised how good it sounds. However, there is no way to adjust the volume out on the phone. It's either on or off.
There is no way to lock the phone directly when its in the dock. But, you can press home to get back to the home screen and let it timeout. Then, you can press the volume key to wake the phone. Pretty handy.
Overall, I'm happy with my purchase. It may be a bit overpriced, but to a dock junkie like me I'm very pleased.
If anyone has any other questions I'll be happy to answer. I will update my post when I check for the verizon nexus compatibility.
UPDATE: The Verizon LTE Nexus with standard battery does NOT fit in the GSM dock.