Diablo III has been a massively successful game. It's also been a buggy game which has kept users from being able to play. As such, Blizzard is needing to release patches to fix these issues. The first patch that is coming is version 1.0.2 and launches next week. This patch will focus on service issues and hopefully fix the issues that have kept players from playing.
Players are probably more interested in patch 1.0.3 which is the patch that will bring the first in-game balancing. The patch includes changes to the Inferno difficulty mode, blacksmith changes, and item levels shown on 60+ weapons. The developers feel the Inferno difficulty mode has too much spike damage and want to lower the cost of training blacksmiths.
Player-vs-player has also been delayed and is set to come in patch 1.1. Patch 1.1 isn't just about player killing, however, as it will also bring buffs to legendary items. Along with talking updates, Blizzard has released some stats about Diablo III and its players. Players usually create three characters, 80% of which are between level 1 and 30. Only 1.9% of characters have unlocked Inferno difficulty mode.