Alex, such a validate link should be on the top of your "whats to do list". For me its an important criterion for my decision of buying LinksSQL2.
I cant ask a Editor to search throug his Categories for links which are to validate...and I dont want to give them all rights of the database-functions.
From the technical and programming view, linkssql2 seem to be very good - but please dont forget the functions for the operative management...