Diablo III news! It's almost like there's a forthcoming expansion or something. In any case, Blizzard is offering 50 percent bonus experience, which should give you a head-start on the new Paragon leveling system. The bonus period ends on March 24, and it only applies to PC and Mac versions of the game.
If you want a full run-down of everything new and improved with the recent 2.0.1 patch, click past the cut and watch the What's New video.