Personally I have  nothing against .US (or .SE or  whatever) addresses as
long as  they match your  organizational pattern. The Royal  Institute of
Technology  in Stockholm  isn't leaving  Sweden anytime  soon, so  .SE is
fine, and I suspect the same applies to your library. Having LSOFT.SE and
LSOFT.COM would  already be  a drag, but  if in addition  we had  to have
subdomains for NY, NJ, DC and so on, it would be a ROYAL pain.
 
  Eric