I can't believe the admins of this website haven't jumped all over your message. Oh well, here's some options, none of which are all that favorable.
-- Remove the hard drive and remount it in either another case or in a USB external drive adapter (in case the damage affected the circuit board of the external case).
-- If the content is valuable, you may end up sending it off to a mac-oriented data recovery service; worst case they can do it in a clean room with the plattens exposed. The probability of success is good, but the service isn't cheap.
-- If the data isn't too critical, and you're willing to take a chance and do it yourself, talk to the OR staff at your local hospital and ask if you can have use of Surgical Supply or the OR at a time when they're not too busy.
The Hospital OR/Surgical supply is NOT clean enough - but it's much cleaner than your house or office. If you can use the facility where they do bone surgery, that's even cleaner; but still not clean enough for exposed plattens.
Take your Mac and HD and tool kit to the OR, open the drive and expose the plattens, run it up and see if there is anything sticking or anything you can do. Then immediately recover your data and enjoy the show. Invite the surgical staff to come watch. All in all, odds are not in your favor, but it should be fun to try. If the OR staff agrees to let you do it, be sure and discuss their protocols for prevention of contamination to the OR.
Years ago, I arranged with a hospital to use their OR to repair a 90 Meg HD, and they agreed, but something came up and I wasn't able to. I got flamed on Compuserve when I posted my intent to expose the plattens, but that particular drive was destined to the trash can anyway.
Nice to know, but doesn't help your situation: The Macintosh community used to have the ruggedized RODIME hard drive that was built to be dropped several feet onto concrete during a save and not miss a beat. They weren't cheap but were also built to withstand enormous G-forces.
Please post what happens.