Multitasking in iOS 4 - compatible apps start appearing

If you have iOS 4 GM installed (now easily done even for Windows users, with the release of itunes 9.2), now you can see multitasking in action even with 3rd party apps, and not only with Apple´s own stuff (Mail, Photos, Settings, etc). The first great example is Dropbox - install the last update, and see how it works marvelously for fast app switching. Can´t wait for more apps to use this, and the other multitasking APIs available!