A few interesting XYZZY related sites:
Want to play Adventure on your own PC? We've located an MS-DOS version that
runs from the
Windows command prompt. A .zip archive of the game and some
related documentation is available.
Even the folks at Sun Microsystems (now a distant memory itself) remembered Adventure. There was an easter egg hidden
in the
administrative interface of the iPlanet 6.0 server that played
the game.
On a related note, information on some of the old
Infocom adventure type games can be found
here.