I signed up yesterday for mine (I still have a PERFECTLY good 32" Sony analog) that has served my wife and I well in the bedroom since we upgraded the living room TV to HD 3 years ago. Plus the TV in our kids room is also analog so we got a coupon for them too. I see no point in throwing out good TVs and causing more environmental havoc than we already have.
Now this coupon system is interesting. It's nice for the common American to get a COOL freebie from the government for a change. But I still believe regardless, the transistion date will very likely be pushed back another year at least. A lot of people STILL don't know what is going to happen on February 17, 2009 and the media has done very little to inform them so far. It's a much more massive change than the industry and government can even begin to realize and they should have started preparing the public from the day the transition date was set.
Like the posters who talked about the UK TV transmitters, it's a similar scenario. I don't think analog will ever go away. Vinyl LPs never really went away - you can still find some newer titles on Amazon.com. It's all in the preference of the person. A niche market overall, but it's there. And as long as the technology exists, it will be used in one form or the other. Did you know 8-tracks are STILL used in the railroad industry?:
http://www.8trackheaven.com/datapack.html
Or there's a guy recording concerts on wax cylinders?:
http://members.tripod.com/~Edison_1/id19.html
These may be some extremes, but the fact is if nothing else, that analog is an old reliable standby and it's just not a good idea to write it off entirely. When everything is run by computers and as long as computers are prone to all kinds of havoc, it's always good to know you still have a mostly fail-safe backup. Digital is not always perfect and sometimes analog is just as good and in some (God forbid) circumstances where digital fails, even better. Or at least better than nothing at all. It's kinda like the movie "Independence Day" where Morse Code by shortwave was used to transmit tactical information to other countries against the alien invaders.
Just because it's old doesn't always mean it's entirely obsolete....