map different subhosts to same blog id

hi there,

currently I use another wp plugin to map my domains.

would it be possible with the wpmudev domain mapper to do following setup:

category1.domain.com/post-id1.html
category2.domain.com/post-id2.html

and have all new posts & abstracts from every category subhosts on the mainpage (http://domain.com/), links from there go to category1.domain.com/some-post and category2.

well the more I think & write about it....I guess I should setup up a unique blog for every subhost und use a summary plugin (which also archives) - any recommendations?

btw, what is the differents between multi-domains and the domain mapping plugin?