In my opinion, OP should start weighing whether or not he wants to pursue expensive data recovery. I have never got any of my "retarded, simple tricks" to work with the click of death, but i'll list them here anyways if OP is desperate.
1. Find a hard/flat surface. with the drive unplugged and fully spun down (wait about a minute) gently tap the side of the drive lengthwise against the surface. This may help to dislodge the arm and return functionality.
2.wrap the drive in a handtowel, put the towel in a zip-loc bag and put it in the freezer for about an hour. Remove the drive and hook it up externally. You will have 5-15 minutes to recover data off the drive if this works. This can work either if the drive has a short or hardware malfunction. It can cause the shorted components to shrink away from each other, breaking the connection, alternatively if it's a metal-on-metal hardware issue, it would do the same, temporarily shrinking the components.
3. hold the drive flat, about 4 inches over a hard, flat surface while it is unplugged and spun down, and give it a drop. Sounds crazy but this has restored 1 or 2 drives to temporary working order. Problem is it works on blind luck and is the most likely to damage the drive further, but hey, if it's pooched already, why not.
In this case I don't see why #1 or #3 would work, but #2 might.
Worst case scenario you can always send it off to a data recovery service. They can disassemble the drive and swap out the bad part in a whiteroom, or, worst case scenario, remove the platters and take the data off them. Generally they will send it back to you on a USB flash drive, but the service will most likely cost in excess of 1000 dollars from most estimates.
Good luck!
EDIT: I agree with whiteodian. Simply plugging it into a working machine is a good place to start. If it comes up, waste no time in taking your data off, you may only have a few minutes.
If it doesn't, start working on the drive or weighing your options.
EDIT 2: As ss202sl suggested, you might try to boot from a Linux Live cd ( I prefer knoppix at www.knopper.net or use the download link http://www.knopper.net/knoppix-mirrors/download.php?lang=en&link=ftp://csociety-ftp.ecn.purdue.edu/pub/knoppix/ ) Version 6.7 has a hard disk utility that will read the SMART data and tell you if the drive is good/dying/dead