Another good host is Talkshoe.com. Not only do they have call numbers, but they have a builtin text chat room for the call. The amount of callers is relatively unlimited(one show had 250(?) callers in his show). If you were looking toward the revenue side you get a fixed amount for the first 10 shows you do of $50(ie guaranteed that amount for the first shows, ie $5 an show). The only reason I suggest it is I've heard from people that that BlogTalkRadio has on occasion deleted episodes or even entire shows. Usually without explanation or ability to fix something before they delete it.