Air Canada Centre is a really nice mutli-purpose sports facility for both hockey and basketball.
I had the opportunity to check out both an NHL Maple Leafs game and an NBA Toronto Raptors game, back in March. The nosebleed seats are really far away from the action. Even worse are the standing room tickets. If you go for a Raps game, moving down is easy, but for a Leafs game, good luck!
The footlong hot dog place here, "Burkie's Dog House" is decent. They have a nice selection of ridiculous hot dog topping combinations. I tried a poutine dog (I'm an addict to poutine). If you go late in the season, there won't be any beers on tap. On the flipside, there will be discounts for team gear in the gift shop.