Ice Caves Need Touch of Terraria

Hi there! I love the recent activity for Minecraft, and wish to say that I'm very happy about the love it's getting. However, Terraria has been slacking as far as their underground ice biomes are concerned. The worldgen hasn't changed in far too long. In celebration of outstripping Terraria in this way, I recommend y'all add some reference to Terraria's ice biomes. Frozen slimes, perhaps? I don't see why living ice balls can't make it into block game. Alternatively, Freezing Water might be 'cool'- Submerging yourself for too long might cause you to slow down, mine slower, or even take increased damage. Thin Ice could make exploration even more of a hazard. Fall too hard on it, and you go straight through, into the icy waters below. Better yet, what about giving us a blue parka for a skin? That seems like the most agnostic way to acknowledge Terraria without affecting game balance.