Amazon has a list for a new Palm Pre Hard Cover. It is a Black case, with a rubber Feel which Snaps-On, but it considered a Hard Case Cell Phone Protector for Palm Pre.
* SNAP-ON HARD COVER PROTECTOR CASE
* JUST SNAPS RIGHT OVER YOUR PHONE FOR A NEW LOOK AND PROTECTION
* PERFECT FIT; DESIGNED TO FIT YOUR PHONE PERFECTLY
* OPENINGS FOR PHONE FUNCITONALITY
* OPERATE YOUR PHONE LIKE NORMAL BUT WITH A NEW LOOK AND PROTECTED
So if you sure that you will own a Palm Pre come June 6, 2009, then place your order on Amazon (if you sp desire) for your new rubberized hard case for the Palm Pre.
Also note, Ebay has a ton of Palm Pre accesories.
NOTE: I suggest you don't buy these cases for your Pre. Why? Does 'gestures' ring a bell?