I've just added the .io and i'll add .com in a bit. Adding in the loop might be a bit much if you're not bothered about certain services - e.g constantly updating the page just because a twitter name cant be found.
Yeah, I agree. You could do a sortable list of services so the user could rank their importance and then pick the best result from the first X(10?) iterations given their preferences.
Obviously, that adds a lot of complexity, you just got me excited.