If you're a student, know python, and are looking for a way to earn some
money this Summer (or Winter if you live in the Southern Hemisphere!),
then you might be interested to know that the moinmoin wiki team have a
"Google Summer of Code" project for someone to "implement a
xapian
indexed search UI + support code that exploits the possibilities of
xapian":
http://moinmoin.wikiwikiweb.de/GoogleSoc2006
Cheers,
Olly