Highly Available VPN server

[Guest LSI]

I've been tasked with replacing our W2K RRAS-based VPN server, and rather

than just do a simple hardware swap-out, I'd like to introduce high

availability in whatever solution I use. This solution could be as simple as

providing two different vpn servers, or as complex as a cluster/NLB solution,

but I want it to be transparent to the end user. In other words, I want them

to be able to double-click a single desktop icon to connect, rather than, "if

this one doesn't connect, use the other one." Any advice would be greatly

appreciated.