Mitigating DDoS attacks is pretty basic, depending on whether they're trying to attack the TCP stack (like SYN floods) or the protocol (like that NTP reflection attack that was going on a couple of months ago). More servers won't help unless you have a genuine scaling problem.
Care to elaborate on the pretty basic way a DDoS can be mitigated? I'm sure plenty of people will be interested...
Mitigating DDoS attacks is never "basic". Mitigating the DDoS attacks that have been ongoing for quite some time against Eligius is time consuming, requires cooperation of many different entities, and is a genuine pain in the ass. But, I'd much rather mitigate than give the attackers any satisfaction.