when the dog won't let you work

What do you do when the dog won't let you work? I love my new dog but he has started this habit, which I will admit at first was sooo very cute, but now has become a bit of a problem. When I sit down to work at the computer and he wants my attention (which is pretty much all the time) he stands up on two legs, rest two paws on my leg and nuzzles his nose under my hand that is working the mouse. He literally gets his entire head under my hand and pushes it up and off my mouse, as if to say "stop working! put that mouse down! pay attention to me!" While this was very endearing at first, it is becoming a huge distraction when I have a web site to design or a blog to write. So, here I sit today in front of the computer, dog bisquits in my left hand and my right hand firmly gripped around my mouse, resolved to train the dog that "down" means DOWN! So far so good, sort of...I guess. He got tired and is now asleep at my feet. He is wedged between my chair and the CPU...so trusting, as at any moment I could forget he is under my feet and wheel back in my chair and run him over.

(dog update: yes, we are keeping him...my son's allergies seem non existent, I think he has willed them away out of sheer desperation to keep the dog. So far so good. There have been only a couple of peeing on the carpet incidents - but I would have to say his whole bodily function thing is well under control. He has managed to survive eating BabyRuth bar that one of the kids dropped on the floor out of their Halloween stashes of candy (who knew that chocolate is bad for dogs) and drinking blue water out of the toilet. I am getting used to having a constant shadow (I can't go anywhere in the house without the dog following me) and his insatiable desire to be loved and patted. All in all, getting the dog was a really great idea. I do get those every so often!)