READ THIS FIRST!
I have denied account creation from "throwaway" e-mail accounts like Yahoo, Gmail and Hotmail. While I realize that good people use them, it costs me time that I can't spare to weed out the bad guys (spammers) and that leaves me less time to deal with site content and your questions.
If your e-mail address is rejected because of this, you are welcome to use the contact link above and request that a user account be created for you. Please include the user name you would like to have in that e-mail.