Hello from lurkdom folks!

Those of you who've got a webserver or access to one may be interested in the bibliography manager project
Aigaion. Aigaion builds upon PHP and MySQL. Some of the main features are: a whole research team can use one shared bibliography database; you can assign different access-right levels from anon (guest) to administrator; you can group the library in any number of topics and subtopics, comment entries, and import and export from/to BibTeX and RIS.
Cheers,
/Sebastian (member of the Aigaion team)