Gordon Brown, or at least his employees, is/are proving much more wired-up that Tony Blair. I remember being asked by my boss to find Tony Blair's email address and the best I could find was the address for his constituency office in Sedgefield which was only meant to be used for his constituency matters.
Gordon Brown has a prominently displayed email form and also, now, his own You Tube page. You can submit your questions via video, and the top voted ones will receive a reply from the PM himself. The deadline is 21st June.