I don't have an iPod Touch but I have had every iPhone version and it has always driven me crazy that there's no AM/FM tuner. I use TuneIn Radio to listen to the radio, and it works very well, but it doesn't quite get EVERY station and is kind of mentally annoying that it isn't true radio. I mean, in areas with no data coverage, it's useless. For about a year I was running my old first gen iPhone with a data block/custom APN (or whatever it's called) and thus was getting away with no data plan. Needless to say TuneIn radio wouldn't work.
Since the iPhone has no FM tuner and NEVER has had one, I would highly, highly doubt it ever WILL get one. I'm sure Steve Jobs and Apple as a whole believe "radio is dead" and/or antiquated like the poster above and as such I highly doubt any of these iDevices will ever have a true radio tuner.
The justification that you can get radio apps on the Touch via WiFi is kind of silly. If you're at home to be able to use WiFi to run your radio app, why wouldn't you just use a normal radio? This is why the Touch (and the iPhone too) need true radio tuners.