Thanks for that link stinky, didn't even know there was a local one myself.
The last one there,
http://astronomy.libsyn.com is a new one that is actually fairly close to what I originally had in mind, so I'm now looking to vary from that format.
Another popular one that is very popular, is the folks at slacker astronomy (
http://slackerastronomy.com) but it is a different format to what I'm planning.
PS - at the risk of offending everyone, I'm trying to move away from the 'stuffy astronomer' image as well, and try to promote atronomy to the masses.