These NPCs are just placeholders for now and don't do anything. Two types, ones with brown jackets (pictured) and ones with white jackets. They all have the same "name" right now.
Swamps look much more like swamps now but their borders are very abrupt. I haven't found any new biomes yet nor gone to the Nether.
Is it just me or does it look like a monk? A Monk sporting a unibrow? Kind of looks like Bert...
Oh, and I kind of liked the snowman head before. The texture pack I use, Sphax BD, replaces the pumpkin with a rune, so unless they replace it back with a pumpkin, I'd have something that doesn't make very much sense.