I am looking for an Altus Poncho.....is there a company that sells them in the states?
http://www.barrabes.com/shop/backpacks-travel-gear/p-20884-d-1452/altus/atmospheric-poncho.html
Not in the US, but available.
I've never seen one in real life, but I have seen http://www.thepacka.com/ and it is an excellent piece of gear.