Definitely have no desire to do anything close to black hat...so redirection and the like just isn't on the table.
We have several divisions here and while our main site talks about all of them, it is easy to get lost in the shuffle.
The idea here is to have a site with a descriptive domain that talks about a single division (i.e. wedding flowers as opposed to funeral arrangements). We would have links back to our main site, of course, for people to learn more about the company, but each site would have unique content and would stand on it's own.