EDIT:New, clearer pics of the Test model up!
I've been telling myself since I started that I wouldn't make a Space Marine army, but damned if I didn't get inspiration for an awesome Chapter! (Not to mention I'm tired of being at a disadvantage with Tau and Chaos Marines because of their old codices...)
This will most likely be a counts-as White Scars or Ravenwing force, with lots of high-speed units. Devastators/heavy weapon teams will be few and far between. Also, all armor will be light-no Vindicators or Land Raiders here, but lots of small, fast Razorbacks, Predators, and Land Speeders. This army's all about hunting down the enemy, breaking off before they can consolidate, and then repeating, constantly striking critical areas and leaving troops in disarray.
Right now, I don't have much done in the modelling or painting department; only two Battle for Macragge marines, and one of them is currently sporting his new colors as a test model. Ladies and Genetlemen, I give you the Vulpes Astartes!
(NOTE: This figure is VERY rough; he's simply a test model so I can decide where I like the color placement, as well as testing my new mix of 1/2 Vermin Brown/Fiery Orange)