Here are a couple of articles by people who are not too keen on the switch. Some of the comments are entertaining also.
http://www.edn.com/blog/1700000170/p...&rid=738728466
http://www.teletruth.org/DTV.htm
Some of the second persons problems could be due to the low power levels being used for transmission at present. However, I have had issues in windy or stormy weather and I am only about 30 miles from the transmitters.