I don't think these examples use viewpager, but visually they look a little like viewpager.
See Evernote's settings:
http://1.androidauthority.com/wp-content/uploads/howto/evernote-screenshots-120524.jpg
And Pocket Casts' handheld control pane:
http://www.shiftyjelly.com/android/pocketcasts
Basically, a panel is swiped in from left, but the left edge of the previous panel is still visible.
So my question is, is this UI pattern featured in an example you have seen, or did these two make it out of whole cloth and now I have to, too?
Edit for posterity:
As of Google I/O 2013, this is now built into Android. They call it the Navigation Drawer: http://developer.android.com/training/implementing-navigation/nav-drawer.html