Update: Cupcake shows the currently running apps in system settings. Find it here.
Click “Home” button for a few seconds on your T-Mobile G1. Atmost six currently running applications should show up neatly stacked.
Apps like “Service viewer” show more information, but you would need your geek hat on before you open that app.


Are you sure that applications cannot be closed?
Yes, the apps cannot be closed, android offers intelligent app management.
What does “intelligent app management” mean? Does the seventh app automatically close, no matter what it is, when displaced by a new sixth app? Or what?
It means that when the system is running out of memory, programmes are closed which aren’t in use. But because (well written) android programmes save their state when closed, you shouldn’t be able to tell it was closed when you next use it. The developer website explains it in more detail: http://developer.android.com/reference/android/app/Activity.html#ProcessLifecycle
Yes apps can be closed, it can be done within the application manager under setting.
Testing AIR and Flash Player …
who knows?
get an android @google?
In Brazil?