Josh Mosqueira has just confirmed a ladder mode will be coming to Diablo 3. This happened during the Reaper of Souls launch party Twitch stream. For those of you not familiar with ladders from Diablo 2, they are a competitive mode where players start from scratch and race to be the highest level player in the quickest amount of time. Details on how ladders work in Diablo 3 will be added as we get them.

Blizzard Quote [source] Coming first major content patch. (Couple of months from now)

Ladder like "seasons"

Still being worked on, date not yet announced.