PWNY is the name of two different radio stations in Equestria. One station is in Ponyville, and the other one in Canterlot. Bucky Hays runs the PWNY studio in Ponyville, and Orson Wooves is in charge of the Canterlot station. Both stations can be picked up with ease on all radios in the Ponyville/Canterlot area.
Ponyville
DJ Pon-3 and Octavia's Show
Vinyl Scratch and Octavia play music and banter a bunch.
Trivia Tuesday
Maven Cash hosts a radio quiz where bits and prizes are awarded.
Ask The Doctor
Dr. Whooves answers your questions.
Colgate Did A Show, Too
Totally she did. Colgate, everypony!
Canterlot
Celestia's Court
Princess Celestia is the law. You don't want to break it.