I currently help run a large (14k+) Yahoo! group and the general consensus is that yahoo is simply becoming too much to put up with. However rather than just switching to yet another group like Google Groups -
I would like to just find some sort of discussion list software and use that in conjunction with the groups website (Currently built using Joomla!, though I don't mind rebuilding it if needed). Oh - I am using A Small Orange as my web host, they are not particularly restrictive on what you can run within reason, but it is not a dedicated server - though I may upgrade to that at some point.
Anyway - suggestions for replacing Yahoo! Groups greatly appreciated.