One of the many VPN technologies covered in the Choose the Optimal VPN Service webinar (register here) is DMVPN Phase 1. Phase 1 with its hub-and-spoke topology is the easiest DMVPN implementation and gives you a simple baseline that can be later expanded with Phase 2 and Phase 3 features (for in-depth DMVPN information check the DMVPN: Advanced and Crazy Scenarios webinar).
Ivan Pepelnjak, CCIE#1354, is the chief technology advisor for NIL Data Communications. He has been designing and implementing large-scale data communications networks as well as teaching and writing books about advanced technologies since 1990. See his full profile, contact him or follow @ioshints on Twitter.