Carmen - I was taught to clicker train by an ex-policeman who was in charge of training the dogs in a large K-9 unit. I think it's a great way to train dogs. I'm so used to AKC obedience including hand signals that I have just stuck with it over the years.
Animal behaviorists and Trainers have been using clickers to train marine mammals for a long, long time. It's gaining a lot of popularity because it works so well on dogs too.
Try this website and if you can think of any specific questions let me know!
http://www.clickandtreat.com
I think I did a post on clicker training.... hrrm. I'll have to find it!
Clicker training is "Operant Conditioning" - do a search on that in regard to animal behavior. Learn as much as you can about Operant Conditioning. It will give you a great background when you begin your formal "clicker training" sessions with Biscuit.
I'll dig up my old stuff and bone up so I can help you if you have any questions. What a great subject to post about!!