Diablo 3 was down last night for the USA server while patch 1.0.3 - which adjusts loot drop rates at high difficulties and overhauls the cost of crafting - launches. It's already back up right now. The patch doesn't launch in Europe and Asia until later today though. The game will be down from 2am GMT/3am CEST on the 20th until noon GMT/1pm CEST - so if you've got urgent business with the Lords of Hell, get it all sorted out this evening. By 'get it all sorted out', I mean 'click on them until they die'.
2DayBlog.com , Diablo 3 patch 1.0.3 has arrived, Diablo 3 patch 1.0.3 has arrived