Here at Penn State there's a wireless system hooked up all through campus that any student can use. However, to actually connect you need to use a VPN Client to handle things. PSU provides a pre-configured Cisco VPN client to students in order to let them connect easily.
However, they also have a bad habit of using one that is outdated severely. Which is no problem, if it works, it works.
The problem was when it didn't work. The specific version that PSU distributes to students had a crippling bug with the Windows 7 Beta releases; once installed you would immediately get a BSOD upon Windows starting to boot.
I have no idea if they've updated the client since Windows 7's release (I've been manually connecting through Windows' own VPN Client), but I wouldn't be surprised if they haven't, given their lousy support for every other operating system other than Windows XP 32-bit.
AMD Opteron 185 Dual Core 2.6 Ghz | 2 GB RAM | 8800 GTS 640MB | Windows 7 Ultimate 64-bit