I got it from my LBS when they were getting rid of winter gear. I think it's the Touring jacket:
http://www.showerspass.com/catalog/m...touring-jacket
It's definitely more rain- and wind-proof than a Descente jacket I also got from them, but neither of them are very packable. I also have a mildly rain-repellent Descente shell (the Velom, before it gained the zipper pocket:
http://www.veltecsportsusa.com/defau...222fl10&clr=by) that fits in a jersey pocket, but it's not very windproof, either. It seems like the heavier, laminated fabric and taped seams that make the Showers Pass jacket so weatherproof also add enough bulk to keep you from balling it up to the size of a fist.
I'd always go for something with pit zips, though.
I
know that other BF'ers have given better options in the past, but for the life of me, I can't remember what they are.