MediaFly

MEDIAFLY On Air is a free site that connects viewers to recent news of all sorts of topics.  In addition to online radio and podcasts, Mediafly lets consumers listen to their favorite podcast and radio shows from the major networks.   Go to MEDIAFLY.com and explore!

You can search by community picks, source or topic.  Here are two topics.

• Education has a variety of sites, but they do not appear to be provided by the education community. TedTalks and GrammarGirl are options, for example. 
• Technology has many popular technology shows, including GeekBeat.tv