The four-year wait between the announcement of Diablo III [official site] in 2008 and its release felt like an eternity but dang, Blizzard have spent almost that long continuing to work on the game after launch. Last night brought a hefty update, Patch 2.3.0, with new monsters, areas, items, a persistent progression track with goals and rewards, and a magical new cube a bit like Diablo II's Horadric Cube. With the ability to reforge Legendary items, transmute materials, and extract powers, it sounds quite a treasure.
Come have a peep at all the patch adds in this here viddy vid:
If you prefer your information in patch notes form, those are this-a-way. It's a big patch all right, adding plenty of new things while reworking and expanding old systems. In the run-up to release, Blizzard also dropped in-depth blog posts looking at changes to Adventure Mode, new and updated item sets, and Kanai's Cube - the precursor to the Horadric Cube.
Kanai's Cube is the most interesting bit to me. Once you get your hands on it, you can reroll stats on items, convert set items in random other items from the sets (handy for ditching dupes and completing your look), remove an item's level requirement for your twinking titillation, gain a Legendary item's passive powers as an equippable perk, and plenty more.
Anyway, the patch is out now, and should download automatically.