Getting Started, Help and suggestions.

I am looking for suggestions on how to broadcast a radio show with Icecast 2, airtime 2.1, and currently Mixxx. Server type: "nginx"

All software is up to date.

I have managed to stream and broadcast just fine to my sites stream player with the above setup.

But I have some problems that maybe someone can offer some suggestions to rectify.

Basically I need talk show functionality. The ability to broadcast LIVE voice, as well as take calls through voip to be broadcast LIVE.

Skype being the preffered option here for calls.

I have looked all over the net and mostly can only find the Mixxx,Airtime,Icecast, setup.

My first problem is Mixxx. While it can broadcast voice and I've hacked a skin so that I can toggle the talk button on and off, there seems to be no way to prevent hearing the "voice" in your headphones. Many would no doubt know it is strangely difficult for most to talk as they hear themselves in headphones in real time.

So any ideas on where to start improving things? Alternative software, that if not free at least cheap as possible as I'm just getting started out and will look at commercial options in the future.

Something where I can mute the local mike audio and tap into LIVE skype calls. And something that can be used easily with other DJ's who will also be streaming on the same "station".

I've logged a wishlist request on Mixxx for the mute local mike option and I guess the more users who do the greater the chances for an update with the feature as it seems many users want it.

If I have to pay what is the best software to go with, what else is compatible with airtime?

Oh and I only have a single Realtek HD sound card, it has front and rear mike speak input and outputs, can they be exploited via cables or software to use skype with Mixxx or similar?

Edit: I am also upgrading our site to use joomla, will airtime and mixxx etc work ok with that???