I haven't done this before, but three or four people I know want websites built. I was thinking about having mini-sites hang off of one of my main sites and creating sub-domains for each one. Though, this can easily be done, I'm just wondering if the sites can be optimized...and will the bots crawl these sites as well or not. Let's say the main site's them is about promoting websites. Then client #1 would have a sub-domain about pets. Client #2 would have a sub-domain about cars. So on and so forth. What do you guys think?