Very intriguing,
http://arstechnica.com/news.ars/post/20080702-first-look-mozilla-weave-0-2-puts-firefox-in-the-cloud.html
Excerpted below. --danbri
[[
Mozilla Labs has announced the availability of Weave 0.2, the third
major release of its experimental Firefox synchronization add-on. This
version brings a broader feature set, improved reliability, and
streamlined notification support. Although it is still in the early
testing stage, Weave is already effective and easy to use.
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When Mozilla launched Weave in December, the add-on offered basic
support for storing the user's Firefox bookmarks and history in the
cloud, allowing the synchronization of the data between computers. The
latest version extends this functionality to also cover cookies,
passwords, tabs, and form contents. Future versions will go further and
also support synchronizing the user's extensions, themes, and search
plugins. Mozilla intends to eventually implement an API that will enable
third-party Firefox extensions to leverage Weave's synchronization
capabilities for other kinds of user data.
... ...
This version also uses a more elaborate key system that will make it
possible for users to securely share their bookmarks with other users.
The UI for configuring sharing isn't operational yet, and the current
security model only facilitates an all-or-nothing approach to sharing,
but future versions will provide a higher level of granularity. The
developers also intend to implement a notification system for sharing on
top of the XMPP protocol.
]]