I'm thinking of building some smaller topic specific websites (business cartoons, animal cartoons, etc...) and linking them back to my main site (http://www.andertoons.com). I'm hoping the smaller sites will widen my search net while giving a boost to my main site. I don't intend to link back to them from my main site.
The thing I'm concerned about however is being penalized for havingtoomany interlinked sites? Any ideas on how many is too many and if this is even a good idea anymore?