I saw this in the jabber.devel newsgroup - thought I’'d pass it on.
Still far from polished, but looks promising. Unfortunately it won’'t work with Wildfire until 
JM-356 (JEP-0124) is done (go vote for it!)
It’'s PHP based, with no DB requirements.
Features:
Easy to install
Design adaptable through client side XSLT
Simple backend to send/receive stanzas
Tested using Firefox 1.5