It's great to get little somethings in the mail. The other patches I've received from them my wife has sewn onto our luggage.
But my favorite item we have received was the 2010-2011 Disney Undiscovered calendar.... it had a lot of great info about unrealized projects from Disney's past like:
-Edison Square (a new land intended to be located just a few steps from Main Street which showcased American at the turn of the century. The plans date back to 1963)
-The Pirate Museum (drawings from 1961)
-Rock Candy Mountain (plans dated 1957)
-Herbie the Love Bug Ride (1976)
-Western River Expedition (this is the infamous planned ride that was going to be at WDW instead of the Pirates redo... too bad)
-Switzerland Pavilion at World Showcase (planned to be between Italy and Germany, it would have brought the Matterhorn Bobsled ride to WDW and would have been updated with "a stunning finale featuring a spinning avalanche tunnel of ice, giving the illusion the sleds were riding upside down."
and lots of other fun info.