When I found out that Apple did not include a PPTP VPN client with OS X, I was a bit disappointed. Sure, Cisco provides a VPN client for those using a Cisco VPN, but what about us folks using a Windows VPN server?
After a bit of searching, I found PiePants, a PPTP client made by Rob Newberry. It works perfectly with my Windows 2000 VPN server. Take a look at it if you need Windows VPN connectivity.
[Editor's note: I have not tried this program myself, but thought it might be of interest to some readers.]
Mac OS X Hints
http://hints.macworld.com/article.php?story=20020409002221756