The National DoNotCall Registry is up and running. In just a few hours yesterday, more than 635,000 numbers were added to the list.
Once your on the list, telemarketers will not be able to call you. You can register up to three phone numbers at once online at www.donotcall.gov. One more note, the website is getting hammered pretty hard by traffic, so it may not be accessible on your first try.
Go register your phone numbers and don't forget to thank your friendly neighborhood Republican for putting an end to telemarketers.