I haven't been able to get my hands on a skitarii kit yet - as they're completely sold out - but I did manage to lay my grubby mechadendrites on an Ironstrider. It will be built as a dragoon, with some alterations. I just love the anachronistical image of knightly dragoons sallying forth on their mechanical steeds - it's really the essence of 40k.
Using a spare head and a mechanical arm from the kit, I quickly threw together this machine cultist:
Painting of the big walker engine has also commenced: