To convert your old TV's to receive digital signals starting February 2009, just follow the helpful instructions in the following video:
Now, wasn't that easy? It's so simple a child could do it....in fact, I'd recommend getting a child to do it for you as they are more likely to understand all that new tech stuff.
Thankfully, I'm a geek and had no problem hooking up my DTV converter box. And, oddly enough, as the woman in the video was wondering, it did bring back Jack Benny ! A local station has a second digital channel that plays old shows and one of them is the old "Jack Benny Program". ("Oh...Rochester !")
I actually watch as much, if not more, video or TV shows on the internet as I do on the TV.