I use both CISCO's VPN Client and VPN Tracker. VPN Tracker will establish a VPN connection through a tethered bluetooth mobile phone connection. CISCO's VPN client will not do this (at least that I could figure out).

So if you need a robust VPN tool that works with most anything including bluetooth IP connections, VPN tracker is great.

The times I've needed technical support they have answered my configuration questions overnight with knowledgeable staff. The built in capability to generate a support request and the extensive logging options are extremely well done.