Gizmodo has compiled a list of Passbook-ready apps, which isn't as many as people were expecting, and is missing previously demonstrated businesses such as Delta, Amtrak, Starbucks and the Apple Store. There's a few Passbook-ready apps not on the list, such as the Canadian movie chain Cineplex, but it's a good resource to start looking for them. We should be seeing more of these apps in the next few months as companies use tools such as the newly launched PassTools to help them make the leap to Passbook.