We suppose it had to happen at some point--it was only a matter of time. Now you can have a virtual pet on your iPhone with Virtual Dog. Registering is a snap with the only requirements entering a username and password. Keeping your dog alive is the hard part, with several different training procedures you'll need to do to keep the little guy entertained. The graphics aren't great, but if a virtual pet is what you've been waiting for on your iPhone, Virtual Dog might suffice.