I posted a few months ago about the Razer Mechanical Keyboard I started using, the Black Widow.
http://bbs.hitechcreations.com/smf/index.php/topic,325223.0.htmlIt's still working the same as out of the box, next to the Saitek Combat Pro pedals and Warthog, it's the best thing new thing I've tried for PC gaming.
I also went on a hunt in a few of the mom and pop computer shops in the small town where my folks like, and found a few of the old IBM PC clicky keyboards in varying condition, and selected the best 2 for a cost of 5$ to keep for a rainy day. I'd say the keys on these oldies actually are just slightly more "clicky" than the new Razer keyboard I'm using, but without all the functionality and USB options.
As I said before, IMO in the next 5 years everyone will be using mechanical keyboards, and they will be ''old" news. Once the price comes down to say 30 instead of 80 dollars, the bang for the buck will make them commonplace. In the meantime, next time you are in a future shop or best buy/what have you, get them to demo you one of the mechanicals....they make such a difference for typing and accuracy.