Michael
I have not done this and have not tested this so I can not speak from any experience. But I think that this would not work. The VPN IPSec Security Associations are negotiated from a specific machine to a specific machine and are an essential element of providing the security that IPSec provides. If you use the HSRP virtual address as the IPSec peer address there will be a time when the HSRP address shifts to the other router. At that point the IPSec peer address will be on a machine that does not have any security association negotiated. This would break the VPN session.
If you want to provide redundancy I think that you would be much better off to put 2 peer statements into the crypto map - 1 physical interface address for each of the routers. That way IPSec can build security associations with one of the machines and if it fails then it can negotiate security associations with the other one.
HTH
Rick
HTH
Rick
