Seein as I might start gaming again next year, I picked up the Orc and Goblin armies book cheap second hand. I was a bit upset to learn alot of things had changed, some of the points costs, netters are now part of regular regiments so clubbers have gone, the way squig teams worked has changed so my models dont really fit, squig hoppers are now part of squig units (although they can break off), and the stats for night goblins are different to common goblins, I presume to stop people always fielding night goblins instead of common goblins.
On the plus side, it does mean now that Orc and Goblin armies are more about massed core regiments rather than a few fair sized units and some odd special troops knocking about.