Does such a thing exist? Ideally, I'd like a 4G device I can take on the road for casual use (i.e. no monthly contract/renewal at this point), that retains a static IP address, thanks.
No that I am aware of on any consumer offering.
Dynamic DNS services would be your best bet.
Static IP required for AWS security I've got set up.
I believe they offer this service as well..
Stick a software VPN router in your VPC. I use vyatta (with one of the community AMIs) as an openvpn server.