OpenDNS

If, like it just happened to me tonight, your ISP DNS collapse, you can use openDNS. Just manually change the DNS in /etc/resolv.conf

nameserver 208.67.222.222
nameserver 208.67.220.220

Many thanks Stemp for the tip :)

Edit: ne t’inquiètes pas Stemp, je sais que tu as toujours raison :-þ

Rescue-Remix, a data-recovery toolkit (was Rescubuntu).

I have already talked about this Ubuntu-based recovery Live CD formerly known as Rescubuntu.
az has released a new version based on Ubuntu 7.10 Gusty Gibbon. Please check the UF thread and their web site for more informations and download links.