I think it's cool to have community-driven websites,
after all it's maintained by people who are motivated and they can have
their own way of working.

An idea is to group the sites in an OSTG-like bar.
( cf. the top of the page on slashdot.org )
This bar would be on every linked site of the bar, so that the
connection between the sites would be more evident.
Also by putting the source on ruby-lang, only this site would have to
be updated if a new website joins the party :p

Cheers,
zimba