The Original Villian Challenge was a contest being held on the Spelljammer Mailing List in March of 2000. It's purpose was to create interesting, ready-to-use villians for Spelljammer DMs.
The First, Second, and Third Place winning entries.
Acealo — "Professor" Desty Nova — Lieutenant Dugak — Gibblet — Ihl — K'r't'dn — Liovel Snergas — Myradius the Insane — Sardeez — Telitharaan Silver — Therros the Grey — Vulkaran