Hey, he's selling it! Look under the header for 11-21-05, down where it says "- Other News / Things Coming Up -" he says:
"I'd be willing to sell my Atari 800 XE Laptop to any interested enthusiast... I mostly wanted the challenge of building it rather than to keep it - I still have my old 800 for Atari fun and game writing. So if interested let me know!"