Quoth Dick's blog:
Today we are informing all users of Sxipper that we will be shutting down the sxipper.com servers and not updating Sxipper to Firefox 4.0. The writing has been on the wall for a while that Sxipper might be put to rest and it was a hard decision to make. It has been over two years since Sxipper has learned any new tricks, and with the release of Firefox 4.0, we can’t justify teaching Sxipper about the new platform.
Dick says he looked for "a new home" for Sxipper but that didn't go anywhere. He goes on in the post to thank everyone involved in the project's development, and notes at its peak, there were 100,000 active users of Sxipper.
He ends by saying that "the ease of use in filling in forms and logging into sites that Sxipper pioneered has yet to be duplicated by any of the competitive products." Dick believes a high bar was set, and hopes that "for the sake of internet users everywhere, the lessons Sxipper learned are remembered and become part of everyone’s internet experience, and that a little bit of Sxipper continues to live on."