I'd like to make a quick point. There are times when I find the discussions surrounding ITIL® v3 popularity to be superfluous. That's because whether or not people are "for" ITIL v3, if they want to work for successful organizations, they have probably already put several aspects of ITIL v3 into practice -- whether they realize it or not.
I recently visited several European ITIL practitioners who are in process of transforming their ITSM implementations to support their dynamic business environments -- the objective, to innovate as the market demands. As the head of the ITSM team at a large manufacturer commented, "any ITIL implementation that is service aligned is doing much of v3 already." I concur.
In his case, Knowledge Management, Self Help and Access Management have been part of his culture for the last 12 months and pre-date the launch of v3.
So please. There is no "for" or "against." You are going to adopt some practices that are suspiciously reminiscent of ITIL v3. If you choose not to label them as such, so be it. Or, to paraphrase Chelsea Clinton, "that's absolutely none of my business."
ITIL® is a Registered Trade Mark, and a Registered Community Trade Mark of the Office of Government Commerce, and is Registered in the U.S. Patent and Trademark Office.