Tower Madness, a new iphone tower defense game, features spudgun turrets! I don't know whether or not it will be any good, but its nice to know that spudguns are going mainstream. Interesting take on design, I wonder how they get that to seal?
There was some fagtastic commercial for gum or something like that involving cannons that looked like this that shot lemons and oranges. If anything, these would probably be more akin to a softball pitcher than a cannon.