I think what is needed here is a hybed. List servers do this function perfectly. However, if you need to display this information in eZ then you could write an extension that pulled the informationh from the listserver and displayed it in your front end design, you could even hack the RSS features and include it there too.
Hope this helps
Tony
Tony Wood : twitter.com/tonywood
Vision with Technology
Experts in eZ Publish consulting & development