Comment http://showmypc.com/ (Score 1) 454
Works well, free, uses ssh and VNC and one time hashes that you'll exchange over the phone. Really quite easy to use, and IIRC its a standalone app that doesn't actually install anything so once you're done there's no port listening afterward to allow anyone an easy attack vector.
blah blah blah I am not affiliated with showmypc blah blah blah