It is fascinating to me that in 2008 people have to be told that they can pick up TV signals off the air. "I can get FOX with out paying for it?" Yes. I think the cable companies have done a wonderful job at getting folks to believe that only cable offers up television programming.
And now "babblin5" does it up cheap on the YouTube...
Update: If you do not want to build one I did a write up about the Antennas Direct DB2 and the DB4 which is essentially the same as the do-it-yourself version above.