Ok, using your binaries, the tun.o and ipsec.o from the walkthrough page you provided, I managed to make some headway.
Unfortunately, it still doesn't work.
On the up side, the binaries seem to work. No complaints or abnormal execution.
Initially it complained that I had an authentication error in the group credentials, but that turned out to be bad info from one of my network admins.
I have my personal username, the ip of the concentrator, the group ID, and the group secret declared in the /etc/vpnc.conf file.
I run vpnc and it prompts me for my password, as it should. I put it in (and have confirmed said username and password on the vpn concentrator using a laptop wireless connection) and then the vpnc app hangs. It goes to a newline, and then sits indefinately.
The same occurs if I use the vpn-connect script rather than just directly executing the program (I realize that if directly executed the routing wouldn't work right, I was just doing that to see if it might be the script hanging, not vpnc)
Anyone have any ideas what might be wrong?
Thanks!
-Jal