I’m a regular reader of the Internet Storm Center Handlers Diary, there have been some recent mentions of the DShield project, where you can upload your router/firewall logs to there central monitoring system, so that they can gather stats & produce reports on the ebb & flow of certain attacks and probes. They also a scheme called FightBack:
DShield.org is now helping users to fight back against attackers. We will analyze submitted log reports and pick a number of strong cases to forward them to the ISP from which the attack originated.