I think that it would still be good to have a home for "generic" Xerces discussion. Otherwise, if you have something that is generic, you would probably cross-post it and many people would get it twice. Or you would have a very useful discussion on something in Xerces-J and Xerces-C people would not see it.
So, how about keeping xerces-dev, but creating new mailing lists xerces-c-dev and xerces-j-dev?
