It's almost time to make a decision on buying an HDTV. But, buying a new television is not as easy as it was in the past. Not only are there technical decisions to be made, there are decorating decisions to be made (do we hang it on the wall or put it on a new piece of furniture). It can also be a very expensive decision so it should be made with care. Cnet.com has a terrific section on "Everything you need to know about HDTV", including a section on how to save your old TV from a snowy death for about $20 or less.
If you'd like to know how HDTV works, visit Wikipedia for the technical details.
The Federal Communications Commission has a guide for consumers including a countdown to Digital TV Transition Day which is February 17, 2009.