There are no requirements as to what specific ISP is used when Internet connection is involved. Wherever there is Internet access, Remote Utilities should work. Except a situation when the ISP or the perimeter firewall in an organization deliberately blocks outgoing connection to our intermediary severs, which is very rare and usually because of an overly strict security policy.
This feature is still in the works. For everything to work smooth it does require some additional changes to be made to other code. We just want to make sure that everything works properly before we release it.