Dave had more then one OJ find... the Oregon find was the most memorable but my favorite was his Indy find. There was 215 cards which included Cusick, Davin, and Veach. Plus many other scarce and desirable cards. Pictures and the story can be seen here:
http://www.youtube.com/watch?v=kgnXD3W1770
He also had the Fargo find of 32 cabinets.
http://www.youtube.com/watch?v=64RrqEB5-H8
There have been many finds by collectors and dealers over the last 40 years, I'm not sure how well documented they are, but I've heard stories.