WordPress MU

Hi Guys.
Installed and running WPMoo nicely and am now looking to do the following:

A client has around 20 domains, some with websites, some just 301 redirects.
The ones with sites I am looking to setup as new blogs within WPMoo.
The domains are variations, domain.com, domain-london.com, domain-scotland.com etc. Most of the sites share the same content EXCEPT where the location is mentioned, for example.

So you might have, for example, "Welcome to our site, the premier site in London" on one and the same "... the premier site in Scotland" on another.

What I want to know is:
Is domain mapping the best option for pointing the new blogs to their relevant domains and can this be controlled within WPMoo/ Admin?

Is it possible to take duplicate content from one blog and use it on another, again controlled through WPMoo/ Admin?

If not, suggestions please.

Thanks in advance.

Maybe you should look at the Category as Subdomain plugin for regular Wordpress rather than MU.

agreed especially with content between blogs concern.