I recently needed a new SSL server certificate, and I didn't want to pay the monopolists (wipe that smile off your face, I'm talking about these guys) an exorbitant fee. Instead, I found InstantSSL, where for a paltry $199 I got a three-year 128-bit certificate. Their administration site and ordering process are well-tuned, and I was able to get quick technical support immediately when I ran into a minor snag. If you need a cert (and you will, if you're enabling RPC-over-HTTP or Outlook Mobile Access), give these folks a try.