Yes , if you have the room for one and have a good view of the southern sky.
Hundreds of channels are available for free , you will need a Analog receiver or 4DTV receiver , and a FTA mpeg 2 DVB receiver slaved .
Some of those channels maybe of little interest if you don't care about foreign language or religious programming , but there are still plenty of feeds and other cool channels to make it a neat hobby and you can still subscribe to some channels.
In fact some of the sporting events alone is worth owning a Big Dish.
Check out some of the channel list available on the web to find out what channels you can pick up.
http://www.global-cm.net/mpeg2central.html
Check out the c-band section at the Satellite Guys forum
http://www.satelliteguys.us/c-band-satellite-discussion/