The Al Franken Radio Network says it is good to go, and will start broadcasting on March 31:

On March 31, 2004 Air America Radio begins airlifting entertaining, progressive talk radio to millions of Americans who for far too long have been and are being neglected by talk radio broadcasters today...

Our programs will mix provocative conversation, challenging interviews and biting political satire.

So to recap the day's radio events so far: Howard Stern, in trouble; Al Franken, in business.