Jumping castles, trampolines and other fun toys for rent:

This is just a compilation of sites where you can find info and rent inflatables for your party. It's not a complete one, but we try to keep it updated:

Jumping castle Bounce rental

Inflatable moonwalks

Michigan moonwalk rental

Inflatables and party rentals - Great Canadian resource site

I've been making a list of inflatable related providers, so manufacturers can find their supplies at good prices; I'll publish it on this site when I verify all contacts (given my current work schedule, that will be around December 15th).