I downloaded the one for rooted devices, installed correctly, and after complaining that the tun.k module was not found, I loaded it in the kernel and the app is working just fine.
tip: If you're on a kernel that has tun support just open a terminal and type:
profit (no I'm kidding, don't type that
My phone is running non-stock (Darky 9.5, Dark Core 2.4), i9000T from Mexico.
EDIT: Cisco...phew....they think they're the center of the universe. The VPN app places an icon up in the notification area and it stays there even when you're not using the VPN connection. Sometimes those guys can be so annoying.