Update 0.8.2.6 is now out, introducing a new unit - the slinger.
* The Sling weapon can now be produced at the armory (any tier).
* Slingers can now be trained at the barracks (any tier).

The slinger is available at tier 1, has a faster movespeed than it's peers, and a short ranged attack with a whopping 50% chance to stun its targets.
The goal with this unit is to introduce some interesting units with micro potential early on in the game. The chance to stun will probably be replaced, but movement-impairing abilities and status effects are here to stay, and will make the world a bit more dangerous to explore.
The AI won't make use of slingers until next patch, which looks like it will be a general polish / bugfix update.
See you then,
/Andreas