Well as a free-content encyclopedia, are we really proponents of special-linking only free projects? After all most encyclopedias reference copyrighted m aterial, and I would think we'd really want more to reference the highest quality material, not just if it's also free content.
So for example we could have a special template link for the Encyclopedia Brittanica for those articles we have, which they also have. As a "blogger" if you will, we, that is the entire project, could enjoy the same special relationship with EB that bloggers do, that is, to deep-link and display content if a user is coming from our project to theirs. (They recently added this ability, normally you have to subscribe.)
To me, that sort of high-quality-link would be beneficial, and helpful to have it specially noted, in the same way that say Wikisource or Wikiquote is, and yet the material is copyright.
Will Johnson
**************It's only a deal if it's where you want to go. Find your travel deal here. (http://information.travel.aol.com/deals?ncid=aoltrv00050000000047)