Usability 
Blogtalkradio lets anyone create an online radio talk show using a computer and a phone. Listeners can call in and participate in the conversation on air. Past shows are archived as podcasts and can be downloaded or streamed.
Blogtalkradio's mobile site lets users search for and listen to the achieved shows. It does not appear to stream live shows to mobile or allow broadcasters to conduct a show using only their mobile phones.
