Obscure but funny:

Strange Brew (Rick Moranis and Dave Thomas playing the Mackenzie brothers. Fav quote: "Luke, I am your father, give into the Dark Side, you hoser.")

Morons from Outer Space (a mid eighties British comedy about some morons who put their space RV on cruise control and crash land on earth--and are greeted as advanced beings)

To Be or Not to Be (the original Jack Benny version, not that lame remake by Mel Brooks)

Great military courtroom drama, and thematically applicable with what's going on in Iraq today:

Breaker Morant (Australian film about some Aussies in the Boer War)

And in the Horror category:

Dog Soldiers