I sent this question to Cloudmade but unfortunately they never responded. Hopefully someone here knows something about how they work.
They provide an OSM download for the Americas which I am using in a project. Although their site states that downloads are updated roughly every month it looks like nothing has changed since December 2011.
Although there are many country and continent-specific downloads available for OSM data online it seems like this is the only place I can get something for all of the Americas.
Any input on Cloudmade's update strategy or alternate sources for Americas data (without setting up my own planet-wide PostGIS) would be very much appreciated.