FLOSS alternative to Dropbox – GNOME + KDE collaboration?

[Jan-Christoph Borchardt <jan inquata com>]

There seems to be a real need for a FLOSS alternative to Dropbox in
both GNOME and KDE. Google Summer of Code is approaching and both DEs
have a collaboration tool on their list.

GNOME has ideas for the front-end:
http://live.gnome.org/SummerOfCode2010/Ideas#Other_Ideas
(Collaboration server/client)
KDE focuses more on the back-end:
http://community.kde.org/GSoC/2010/Ideas#ownCloud

To have a DE-independent alternative to Dropbox (and Ubuntu One for
that matter …), wouldn’t it be great to collaborate on that project? I
didn’t know if either idea knew about the other, so here’s the update.
:)