Dribbble - Spotlinks - iPhone Sidebar by Stan Mayorov
30 Dark iPhone App UI Designs - these colours work well
iPhone Timeline App by Janna Hagan
uMentioned Feed UI by Janelynn Chan
Ours slides opposite direction, but similar concept would work. But we could show a sliver of the lower layer (via shadow or something) with the arrow or other call to action so the user will know there's more information available.
Dribbble - Contact list menu by Angel Bartolli
This is how to view the contact card in my upcoming project.