I don't have an HD radio, but I rented a car this week that did have it. Although several Knoxville FMs have HD-1 channels which echo the main channel, none of them have HD-2s or higher. However while scanning around, I found that 105.7 in Crossville has not only HD-2 (which is used to feed the translator for 101.9 The Vibe) but also has an HD-3 which has an interesting oldies format (and a very basic web page at wihghd3.com). Why haven't any of the Knoxville signals put up some HD subchannels, even if it's just something automated? I'd probably purchase an HD radio if they did.