Backyard gardeners, small farms, farmers markets, people making under $500,000/ year are exempt from this law. You are welcome to grow your own garden and sell produce.
Unless you use a commercial seed cleaning machine (which is to be inspected), there's no problem with saving seeds for yourself.
After reading several articles, all saying the same thing, I found this one gives an easy to understand version. Check it out for yourself: http://www.csmonitor.com/USA/Politics/2010/1123/Food-safety-bill-101-What-are-the-facts-and-myths
Here are a couple of more links: