From Radio-info.com:

More locally-unique HD-2 channels are part of the "second generation."

Some of these have already gotten attention - CBS Radio's revival of the
call letters of WNEW-FM, New York, and the "Live Rock from the WMMR
Archives" by Greater Media in Philly. Some formats on the multicasting list
being announced today haven't gotten as much print, and the HD Radio
Alliance is playing up their local-ness and diversity. Like: Emmis' "Local
107"/local artists, in Austin. "Indie Rock" on Clear Channel HD-2 signals in
Portland (OR), Oklahoma City, and Seattle. And Entercom's "Rock Independent
Radio - 94.7 Too" based off of KRNK. That means Portland, Oregon's going to
have two "indie" stations competing - at least on the market's small number
of extant HD receivers and then online. Independent rock also wins a helping
hand from Clear Channel's Coachella Festival-inspired "eRockster" HD-2
offering in L.A., Philadelphia and D.C. There are also some hyper-local
channels, such as Clear Channel's "Radio Free Hawaii." While Beasley's doing
a country "Gretchen 99.9" for Miami, CC's featuring "Old Skool Hip Hop" in
Boston, and CBS Radio's putting "Chick Rock" on in Dallas. Notice that most
of these are music-centered and often relatively jock-free. The Alliance's
Diane Warren says "we know from our research that if consumers hear content
they can relate to in their market - and they can find it easily on
HDRadio.com - the programming will inspire them to buy an HD Radio."