All you need to do is register with them, then you can have access to all the sample links. Once you find a sample you'd like you click on the link and it takes you to the sample's source. All of the Wal-mart samples show up in this database and a lot of direct manufacturer samples show up as well.
I haven't spent a lot of time checking out the other aspects of the web-site, but it does look like a great resource. Check it out today!