I don't think my team is capable of doing this, but one idea would be to "somersault" up the edge of the pyramid. I think this could be done pretty quickly and effectively, and I am even placing a bet that some of the top teams will do it. One example would be team 148's mechanism to grab onto the pole, lift itself up, then have a second arm on the other end of the robot grab on, the first arm would let go, the robot would flip using the second arm, and so on:
http://www.youtube.com/watch?v=_hTyXQUgYLE