Stuff I have personally spent bitcoins on:

-Clothing
-Electronics
-Magazines
-Computer
-VPN subscription
-Gambling
-Investment (not really a purchase)

Small sampling of stuff I would spend on if available:

-Grocery (gotta be local though)
-Local dining/entertainment/leisure
-Marine aquarium supplies
-3D printing
-Tools
-Books
-Music
-Movies

Some of the stuff on this list is already available, but not easy to find/not good enough selection.

As a someone who sells bitcoin on https://localbitcoins.com/ad/222 (small plug for anyone in Toronto), I have to say that I mostly see interest from people looking to feed coins to silk road, for what it's worth.