http://telecom.unl.edu/ has a UNL template site built using the Dreamweaver Templates.
The code is from late December 2003 though, so I wouldn't take it directly.
I agree, I think a common set of DW template files would be very useful.
One cautionary note I would suggest, if there were ever to be widely used Dreamweaver templates, the region names should be carefully thought out, and perhaps agreed upon by interested parties?
just my 2 cents.
Just to get some ideas going, here are the regions used on the telecom site (in addition to default regions).
Submenu -- for defining the callsub navl2 text to be displayed
Sidebar -- (perhaps should be named something different? meaning these are alternate links that in a future template might not be placed on the side?)
Body
Breadcrumb