Theantennaweb.org site is rather conservative as to which stations can
be received. *I'm between two cities using a directional rooftop antenna
for one city's analog stations. *I found that I could receive all that
city's digital stations and a few from the town in the opposite
direction. *During some stormy weather last week I couldn't get a few
stations -- I don't know if the signal doesn't travel as far in bad
weather or whether the digital transmitter was down or running at
reduced power.

As for more stations, several of the "big" stations have one or more
subchannels -- check the station's website.

An alternative site that provides more detailed information for the
technically inclined is www.tvfool.com