No, XML is not a human-editable configuration language
XML, as nice as it is for many things, is not so fun as a human-edited configuration language.
I just (today) switched my Jabber server from Openfire to jabberd 1.6. This enabled me to move Jabber services back to my leaner, meaner FreeBSD mail server VM without requiring Java and in general being somewhat slow. With this, though, I sacrificed the nice web-based configuration/control panel that OpenFire provides and had some configuration files to edit. Not a substantial problem — with documentation, I’m fairly comfortable with this process.