Uspn is short for Bjørn Christian Tørrissen, a writer/photographer from Norway. He has published the book "I pose og sekk!" in Norwegian, which has also been translated into English as "One for the Road"
Most photographs added to the Wikimedia Commons by Bjørn can also be found in his on-line extensive travel photography gallery.
This is a list of the photos he has donated to the Wikimedia Commons so far.