How Do I… Clone My Blog for Clients??

Hey Folks:

I just got into WordPress two days ago and I’m loving it! (Even got “WP for Dummies”)

As a filmmaker, I’m creating various film packages for local companies. One of the “gifts in the stocking” I want to add to the mini-documentaries I’m doing for clients is a personalized WP site for their company. This WP blog would also include photos and video footage I’ve shot onsite.

So, in short: I want to create a WP Template Blog (with plugins, etc.) which I can then CLONE and quickly personalize for each client. So I’d have one original that would be “cloned” for lack of a better term, and then personalized.

Any thoughts on the best procedure? Obviously, I don’t want to build each client’s blog from scratch. Also, would this template best be built on WP.com or WP.org?

THANKS!
Bob