This is a very important question that everyone seems to have overlooked in the pissing match.
What countries do you plan to market your services in? This is going to determine the best course of action.
There are lots of good people on this thread, lots reading it. We have relationships with several companies that provide similar services. One of our consultants might be able to help you on this, he's in the middle of setting up a HUGE project with global scheduled rollouts and premium rate in many relevant markets.
Or if you're just screwing around, throw a dart at a board and pick a company, there are lots of good ones here these days. If you're serious, email
[email protected] and I'll forward it to the appropriate party, he rarely posts. If you will be in Amsterdam you might be able to meet him.