I have heard both pros and cons about having your main company website link or showcase all the sites in your network, would like to hear what you do and why.
most people will tell you it depends on the PR...but others will say no...I have many of my sites linked like that, but not all of them...
Some, but not all, I think it depends on the type of sites you have. For example I link all my travel sites together, but have other sites in differing niches unlinked.
We do it from the main company website to the sub divisions, but not from the sub divisions (which have their own domain) back to the main site or to other sites. Timo
It depends. If they are blogs then you could just occasionally point to an interesting blog post on another one of your blogs. Having sitewide links to your other sites isn't a good idea in general.