Spotted this on BOLS, didn't anyone else...? It's the gatelling tank, the one with 20 shots a turn I reckon:

http://1.bp.blogspot.com/_4nzgPbHlNo4/S ... k-peek.jpg

There's pictures of it up on Warseer, along with comments that they believe it's a conversion and not a model that will be available in that configuration (at this time). I suspect that they took half of the gun for the Stormlord Vulcan MegaBlaster (if I remember my guns right - the Heavy 15 gun) and put it on the front of a shortened cannon barrel.

I'm looking forward to the stats for it, though (I suspect 10 instead of 20 shots, though)