There was just an update to Minecrack which means the multiplayer server is down until "Bukkit" which is the server software is updated. They're working on it but I don't know the ETA. You can fire up singleplayer and check out the changes - think it has to do with Wolves and Beds. Achievements got pushed back. Go play something else for a day or 2 and give poor Jon a break from Minecraft talk (I know you hate it Jon!!!) :)