Nothing new about skiing with one pole:
from Wikipedia:
"Some Telemark skiers continue to ski with a single long pole or "lurk" held in both hands in traditional style. The lurk should only contact the snow on the inside of the turn, though some find better balance results if the lurk contacts the snow on the outside of the turn."
I've seen some old Norwegian footage on TV where the guys threw front flips with leather boots, wooden skis and long single poles.
A quick search also lead to this:
www.telemarkdown.com/index.pl?page=telestick.