A new version of Dwarf Fortress has been released, after almost a year of development and with LOTS of new, nifty features, from one of the most complex games ever created.
What new is there? according to the official release data…
Well, it has been a while. That means potential instability, so don’t get too attached to your fortresses at this point. I’ll be doing subsequent releases more often now as I solve problems. In any case, dwarf mode now has a z-axis and you can make fortresses that span several levels. Fluids behave much more reasonably, and you can walk across the world in adventure mode in the local view without having to step off of an artificial edge. And various other lots more stuff.
Full info available at the devlog
Finally some players reactions:
My first coolest discovery was when I figured out what the symbol for volcanoes was.
This was quickly topped when I realization that my volcano starting site had abundant hematite right out in the opening.
This, in turn, was displaced from its status as coolest discovery when I realized I could look inside the caldera and say hi to all the imps living inside the volcano.
Finally, the most truly ultimate discovery in my first five minutes occured when I popped the units menu open to look at the population of fire imps and such, and discovered that my fortress site has a wandering population of snailmen on the plains below. Snail. Men.
This is totally awesome, even though I’m not entirely sure why.

3 cool things I’ve so far spotted:
1. You can set the Flag [CIV_CONTROLLABLE] on any entity_default civ and you can play them in dwarf mode (Human settlers anyone?) they don’t seem to need to come from [MOUNTAIN_SETTLEMENTS] anymore.
2. You can build Huts. If you build a room with 4 walls on one level,then build some stairs up and “roof” it with construction floors, it counts as inside on the lower level. (That means, you can make rooms, place beds etc. inside) I find it rather cool to have my lumberjack live outside in the woods with a small wood stockpile nearby.
3. Hunters are FAR more effective and are FAR less likely to get killed. one hunter bought in so many deer corpses that my butcher had a problem to keep up.

Just noticed a natural cave on my map with a perfectly circular HUGE lake in it. The cave is stuffed with cave spider silk and (I assume) lots of cave spiders. The lake is inhabited by a tribe of frogmen and a solitary giant toad.The nearby mountains are roamed by packs of skeletal goats, who occasionally hop down to harass my dwarves (but thankfully not very often).
I could go on and on, as the game spawns interesting situations out of nowhere. Now, download and play it!
Slaves to Armok II: Dwarf Fortress By Tarn Adams
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Thanks to MasterGeo for the screenshots!