It depends on what your definition of 'peacekeeping' is...

From The Weekly Standard:

DURING THE RECENT month-long war between Hezbollah and Israel, U.N. "peacekeeping" forces made a startling contribution: They openly published daily real-time intelligence, of obvious usefulness to Hezbollah, on the location, equipment, and force structure of Israeli troops in Lebanon.

UNIFIL--the United Nations Interim Force in Lebanon, a nearly 2,000-man blue-helmet contingent that has been present on the Lebanon-Israel border since 1978--is officially neutral. Yet, throughout the recent war, it posted on its website for all to see precise information about the movements of Israeli Defense Forces soldiers and the nature of their weaponry and material, even specifying the placement of IDF safety structures within hours of their construction. New information was sometimes only 30 minutes old when it was posted, and never more than 24 hours old.

Meanwhile, UNIFIL posted not a single item of specific intelligence regarding Hezbollah forces. Statements on the order of Hezbollah "fired rockets in large numbers from various locations" and Hezbollah's rockets "were fired in significantly larger numbers from various locations" are as precise as its coverage of the other side ever got. ...

From Jed Babbin:

The U.N.'s years-long record on the Israel-Lebanon border makes mockery of the term "peacekeeping." On page 155 of my book, "Inside the Asylum," is a picture of a U.N. outpost on that border. The U.N. flag and the Hezbollah flag fly side by side. Observers told me the U.N. and Hezbollah personnel share water and telephones, and that the U.N. presence serves as a shield against Israeli strikes against the terrorists.

So "peacekeeping" means aiding the side you're friendly with. Interesting. Some might argue that it's just a case of siding with the "little guy", but that's a load of #!@%. The U.N. is on the side of the terrorists / Islamic fascists. Whose side are you on?

The U.N. is about as useless as John Kerry, and vice-versa.

Update: Hezbollah bunkers were apparently built right next to U.N. "peacekeepers". Bryan has the story.