vpn encryption

["taproot420" <taproot420@myrealbox.com>]

I was wondering if its possible to use full strength Rijndael as the vpn
tunnel encryption instead of 3-des in openbsd? A co-worker is testing a
product in the lab called open-vpn or something and he is using Rijndael
as his tunnel encryption. I was just wanting to know if this is
possible? By the way has anybody here used the open-vpn or know if its
any good? I hear its not attached to the tcp/ip stack like traditional
ipsec vpn, and runs entirely from udp-500 therefore getting past the nat
issues that plague current vpn.