I think its a cool domain. I have 2 .us domains and there working out well The .us is very common, but it is reserved for US citizens and legal aliens so you dont hear much talk about it outside of America.
The best thing about the .US is there is more domains available and because it is reserved for Americans it means that people outside America cant reserve them then sit on them until they get the right price.
The main reasons I was considering it was A: you're right, a lot of people haven't taken it and B: I believe I am going with a domain name that is in german simply because the pharse means a lot to me, and I think that .us would counteract the idea that the whole thing is german, you know?