RootThisBox.org broken-down temporarily:
In the main page they writed:

"After a month of RootThisBox going
without stable host and with a certain
administrative member who had the urge
to mess with the hard drives a lot, we've
moved to a more stable host and have
disposed of said person and will launch
RootThisBox (yet again...) in the very
near future!"
[www.rootthisbox.org]

We hope they return soon!