Myspace is for stalkers and noobs. Its true. Honestly, Tom has *no* need for one - he can design his own website, which is much better. He even has a forum of his own, as well as an irc channel - He does not have the time to mess around with updating such stuff.
That being said, I dont know if he does or not - I have never seen any evidence that he does or does not have one.
However, let it be known, that people using myspace are looked down upon - just look
Here - As you can see, people *hate* myspace. Unless you are on a runescape forum or something, it might not be wise to show your myspace account name to everyone, if you want people to think highly of you.
-RobbieThe1st