Current state of gnomes in version Alpha 0.00**4:
Druidism is in, it is the same as the last version.
Tinkering is in. Most equipment and recipes are the same as before, but clockwork helmets have been nerfed significantly.
Grinder traps no longer hit 30 times, so they shouldn't be as ridiculously expensive as they were before.
Constructable robots are in, but may experience issues on reloading saved files due to creature spawning problems.
Automatic factories are not in. The electrostatic generator is in as a placeholder, due to its importance in the tinkering system. It operates without power for now.
Guns, bombs, and blackpowder production has been removed. You must purchase it from the dwarves to make certain advanced devices (right now, only the rocket boots need it.)
Drills and buzzsaws have both a basic attack and a secondary attack. The secondary attacks are very, very slow, but excellent at killing thick-skilled unconscious enemies.
Railguns are still awesome, and you can now order them in crates. They are very expensive, though.