Flip hasn't (yet) figured out a way to let you film yourself and still see the viewscreen. That's of particular concern to vloggers (video bloggers.)  That may be all you want to do.

You're probably already using a mini-tripod to steady your Flip.  Put a make-up mirror (the kind that has a stand) behind the Flip.  Angle the mirror until you can see the viewscreen.  Many of these mirrors have one side that magnifies, and that may work even better.