I worked on the head of my Praying Mantis stalk tank yesterday but didn't get a lot done. I'll be much happier when I have the head sorted out, then I can move on to the Scorpion cannon. Once that's complete its just the additional 'pretty' bits to tart it up and then it'll be on the paint table.
If you've been following my Daemonhunter battle reports you should enjoy my latest instalment. This game was against Jamie's Crimson Fist Space Marines, and despite only being 1000 points per side it turned into a bit of an epic. Check it out here.