Liberals don't need talk radio, they already have ABCNBCCNNCBS doing their bidding for them.
Some have felt that if Air America went under, and if NO "progressive" (ha) talk shows were on, there would be pressure to bring back the (un)Fairness Doctrine. Libtalk radio hasn't succeeded in the free marketplace of ideas (word is now coming that it'll be off the air in liberal Boston, replaced by "Rumba" Spanish-language programming, and L.A. will probably be next).
There are a couple shows, not syndicated by Air America
but by Jones, that MIGHT be a marginal success (very
marginal), perhaps
if placed on the bigger, mostly-conservative stations
(but tape delayed). That being said, the likes of Rush
or Hannity have 12-14 times as many listeners as the
most "successful" libtalkers. And that's just ratings--
what about billing? (After the lib hosts bash big business
then find they have...no sponsors...wonder why.)
Liberal talk fans already have NPR, much of TV,
Hollywood, music (Dixie Chicks, Barbra Streisand), etc.
They still are not showing any real promise in talk
radio. But yes we need to worry that the libs might
try to bring back the UNFairness Doctrine to get
their way.