Thanks for all the feedback so far! Great ideas.
For an example of what the custom recips might look like, here is an example.
http://www.greatsexgalleries.com/adult-anal-porn/
The title attribute is used, if that is how you have it setup on the recips you are having your webmasters use.
I don't follow how these recips would become outdated. Unless the linklist owner decides to change his anchor text or title tag.
Figuring out how to group the LL's together to satisfy everyone might be a problem. I was gonna have it grab the niche recips at random from a pool of LL's, and place them into your table. Of course those LL's that only want to be grouped with other large LL's, could pose a problem for submitters, gonna have to give that some though and try to figure out a solution.
It might be a while before this script is released, so keep the feedback coming if you have suggestions or ideas.
Thanks!