Consider to make it interactive like Chaosradio does. It is less one-way traffic then, and you can have fun while receiving feedback about a subject. It becomes more community project then. You can get feedback live by phone or IRC.

I have to say I don't like podcasts much (nor radio). They cost too much time/focus while not so informative. I'd rather read then, in car I have own music. I do like some vodcasts, like review of device. But I know there is interest and nice addition to community.

You can use SIP (or Skype) and have conference calls (audio, or also video) but IRL together with another host is more common than you may think. You can then also read each other facial expressions which is useful.

Unfortunately almost all radio pirates here have ceased to exist due to pathetic fines so can't rebroadcast it live. Great how government can ruin life of a good friend of yours that he becomes homeless...