I don't believe the S20 has been discontinued... But, I wouldn't be too surprised if HP came out with a new Photosmart in the near future. Ever since Minolta came out with the Scan Dual II, the S20 doesn't seem like such a good value anymore (unless you want the print scanning capability as well).
BTW, if anyone is interested, I am now selling my S20...
To most people, the sky is the limit. To those who love aviation, the sky is home