I have a Terry Evanswood's autograph on a card, i think that's pretty much it as far as stuff like that goes, i have some books, but none of the classics yet, (I'm getting them VERY soon, don't worry)
Here is an interesting pdf file from Lee Asher http://www.leeasher.com/store/playing_cards/gift.html.
For those who collect playing cards there are some interesting topics in it:
-The Optimum Environment for Jerry’s Nugget Cards
-In Case of Emergency
-Common Card Concerns
-Card Conditions: How Do Your Cards Rate?
-Resources you should know about for Playing Cards
An interesting DVD tour throught one of the largest magic collections in the world. I own this dvd and i must say it is absolutely outstanding to see the quantity of material Darwin possess.
A must have for any collector. http://www.youtube.com/watch?v=3EpVs9cEXc0