Apple goes through transitional phases, if it could have lopped off that white macbook completely it surely would have. And as with any good Apple faithful knows, you don't buy version 1. If you really want a laptop it's best you wait until next Feb when the specs are updated again and the kinks worked out.
This then brings into question what WILL get updated during MacWorld. I'm thinking SnowLeopard, Mac Pro/Mac mini, Apple TV, and iPhone.