Looking at the TvRadioWorld listing for Pocatello, http://www.tvradioworld.com/region1/id/tv.asp?m=ida it appears that KPVI is the only high power DT signal at the moment. KISU, channel 17, is running about one third the power as 23, and KIKD's digital feed, on channel 36, is about .5 percent of KPRVI's (2.2kw vs 505kw.) Presumably, by the time the rest of them have something you want to watch, they'll have cranked up power to where you can watch it.
Strangely enough, there's a digital signal listed for channel 9, KIFI (right alongside their analog on 8), which seems odd because all the DT stuff is supposed to be UHF. Are you seeing a digital signal on 9?
The only working NTSC analog receiver in my house is the digital video recorder/DVD recorder. I record ER automatically in case I don't have an opportunity to see it. The majority of "TV" in the house is DishNet. My wife and kids watch that stuff.