Can DDOS help nationstates manipulate international politics? Yes.
A colleague alerted me a couple of days ago to a massive DDOS attack against Kyrgyzstan ISPs www.ns.kg and www.domain.kg which essentially shut them down on January 18, 2009. There are only 4 ISP providers for the entire country so this attack was clearly sending a message. Since the attacking IPs were Russian, and since the Russian government supports the current Kyrgyzstan President, I’m thinking that its a message to the opposition party.