Cool stuff!
Which were the official (infantry) mini's GW released back during SoC? Only Teutogen Guards?
Lots of special characters and some warmachines that then made it into the army books: Be'lakor, the big mounted Archaon model, Chaos Hellcannon, the Exalted Valten, Ar-Ulric, Borgut Facebeater, Slayer Doomseekers, Malakai Malakaisson's Goblin Hewer, probably some more.
Not sure if the newer Kislev models were released during SoC or some months before. Winged Lancers, Ungol Horse Archers and the Ice Queen Katarin were there since the 4th ed, but all the other Kislev models were released in 2003, IIRC.
-Z