Interesting discussion, here is my two cents worth.
Adding LB stuff to this site may increase awareness of LBing, but I wonder how much because GC.com already makes mention of LBing on the links page and in periodic discussion threads. The potential is to inform someone who hasnt looked at the links page and who doesnt read the boards.
My first thought was to treat LB "caches" the way benchmarks are treated, with their own area of the site. This would keep them seperate, but on this site. It would also put GC.com in "direct competition" with LB.com and may begin the downward slide that someone mentioned above.
The only practical issue I see is that it is yet another cache type. Which is fine, but I think as there are more types, there should be a way to filter the searches/nearest caches report to not show particular types.
Which brings me to the only real issue I see for or against adding "pure letterbox" caches; Effort. No matter how they are added to the site, it takes someone some amount of time to do it. THis is time taken away from something else.
So....oh nuts , that looks like four cents worth. Ok, Ill keep quiet on the next one.
WindChill