I've gone as far as deleting the key from the registry but I used
PHM RegEdit which is old as dirt but is free and still works. I'll try the connection when I get home but it's no longer stuck in the infinite connection loop it does when the key existed.
Anyone know if Sprint will charge for using this? Incidentally I found out yesterday that they'll be implementing a 5GB/mo limit on internet which isn't really a big deal for me since I wouldn't get to that on any month but thought I'd mention it.