Smashing cans is good therapy, canuck!
Luvsginger, the Silpats are meant to be placed on top of a regular cookie sheet, not used alone (if I read your post right!). I don't like those silicone "pans" you mentioned, they're too floppy for me. But the Silpats are awesome for anything sticky - I use them for cookies, making candy, caramel apples, rolling out pie crusts....it all just slides right off. No more flour mess on the countertops.