How do you sort your bibliographical references?

[Roberto Takata <rmtakata@gmail.com>]

I was wondering if it could be useful to offer a wiki-based online
service (for free) to people organize their scientific references -
they could publish a page with their notes on an article ou groups of
articles and link it to the online article and other pages, they could
organize their comments in groups and topics, and have a search engine
to find it if they forget where they put them. If they want, those
comments and notes could be shared with other people or simply be made
secret (protected by password).

What do you think? Is it just a wheel reinvention or could be a helpful service?

[]s,

Roberto Takata