I posted about this product last week - Organic Edamame Spaghetti (http://www.explore-asian.com/products/edamame-spaghetti.html#.VoqsHvlVhBc) is lower carbs and has lots of protein. I actually like it a lot, and Costco carries it.
I think the same company also makes black bean pasta, but I haven't seen it in stores.