Just as heads up for all of you:
A bug in the new v. 2.0 software for the iPhone/iPod Touch which includes a Cisco VPN causes the iPhone VPN client to grab the entire assigned netblock, thus blocking routing to all other VPN clients!
We chase this intermittent issue for a few weeks here. The Bug ID is CSCsr40360.
The only fix so far are a work-around to keep iPhones from connecting, or setting up separate profiles for iPhone clients.
As we are expecting hundreds of students to arrive is a couple of week with iPhones in hand we really need a fix for this soon!