Greenpeace says an IRS auditor told it that the PIW letter triggered the audit. The IRS won't say how it decided to audit Greenpeace.

What is clear is where PIW has gotten a lot of its funding: Exxon Mobil Corp., the giant oil company that has long been a target of Greenpeace protests.

Anyone want odds on these guys taking a look at DeLay's, Santorum's or hell, even Jack Abramoff's non-profits?

WSJ.com - Did a Group Financed by Exxon Prompt IRS to Audit Greenpeace?