Support to Routers with an embedded VPN option (e.g., Easy-Box 904 xDSL)
Support to misc. routers with a VPN option that can be activated when configured (e.g., Easy-Box 904 xDSL).
Same would be useful for enterprise equipment such as Cisco routers/firewalls and check point. IPSec is a standard (OK, framework if you're picky) after all