I was going to ask you by email about this Tim, so nice to see that it's being discussed here-- and that it is as simple as setting up an instance to copy.
I'm looking to do something like this for a DML workshop in October with Justin Reich, and we were wanting to make a starter site with a FeedWordpress syndication set up, maybe others with the DS106 Assignment Bank, a few SPLOTs, some of the whacky stuff Tom Woodward does.
How might this work for individuals, who are under their own WHM? Might we make a collection of these Reclaim could offer? I'm not sure about cluttering the primary Wordpress install with options, could you make a second WP installer with a collection set up as prefab options?