I am trying to tweet poems to NPR's Tell Me More.  When I tweet in the what's happening? box on my homepage w/ TMM's address in my address bar or in the search box, they appear on my homepage.  I know a DM won't work because Michel Martin probably isn't following me!  Would an @user work in this case?  If not, what is the proper way to send a tweet to a radio show? Should I expect some sort of acknowledgment of their receipt of my tweet?  
How to send a tweet to a radio show
twitter