A quick search for "hanger" brought these up
Spare Wire Hanger? Make a DROID Stand!
Here's one made with the droid box your phone came in
Home Made Droid X Docking Station
HOW-TO: DIY media/car dock Has where to place the magnets (check out page 7 for another idea).
DIY Droid Dock/Stand - Using Legos or K'Nex this one has some links to the ideas, scroll down. And check out post #8....