While one can debate exactly how extreme a keyboard can be, one very nifty function will be the programmable macro keys the first line of keyboards will have. They also play up the reliability of the keyboard, claiming it will last quite a while and feature a rubber coating. The latter part I can actually find some interest in, as in my gaming years I have worn out more than a few keyboards. The price is more than an off the shelf dirt-cheap keyboard at $29.99, but certainly is well within an average budget. You can read more on the product page.
OCZ originally demoed the first of their Alchemy hardware just one month ago.