Gastrick
One of the Dirty Dozen!
I'd try to hook up the HD to a second PC first. Then, if you can't get it to come up, put it back in the old PC and take it in and see if they can salvage the data. If you take it to Best Buy or the like, they may stupidly reformat it - never trust a low paid employee to do something smart.
I hope you fellas pardon my ignorance in matters of technology, but is there the possibility that I'll transfer the virus/spyware/malware that killed my previous computer, into my new computer, if I hook up my old hard drive to my new computer?