A bit of novelty software, Windows-only. Ellison contributed an original story, "The Dreams a Nightmare Dreams" (later collected in Slippage), which appears here both in printed form and on audio cassette. The latter, narrated by HE himself, is a marvelous example of the author's considerable talents not only as the creator of spectacular fantasy, but as a dramatic oral interpreter of those wild yarns.
As for the screen saver? Couldn't tell you. I'm a Mac guy.