Basic Style design: Design By: Miner Skinz.com
(much altered by Gurdur)

For smilies:

Koloboks, including Aiwan, ViShenk, Just Cuz, Laie, Connie, snoozer, Viannen,
and especially Mother Goose too.
KitKatty. and PederDingo, and phantompanther.

For icons:

FamFamFam, and bleros.
Nick La (including code) and Jack Cai, among others.
Icons by DryIcons' Works, and icons used under paid licence to Iconshock.com.
Navdeep Raj and The Smashing Magazine Team.
Sebastien Durel, and Jonas Rask.
BecomeUnbroken, and figu120, and egtrix, and LoreleiWeb.

For help, coding, and/or modifications:

Different people at vBulletin.com, and a whole lot of people -- too many to be individually named, sorry -- at vBulletin.org

For artwork, avatars, backgrounds and so on:

KitKatty, and verte, and britpoplass