The SEO Gurus and Experts have been somewhat less vocal than
usual over the past few months. It can be traced to the
revelation by Mark Cutts at SMX Advanced in Seattle as reported
by many including Lisa Barone and Dan Thies that basically
nofollow might not work like people expected for sculpting
PageRank. You might have expected that, if it did not work, this
might already have been spotted by some of the gurus. However
there was no hint anywhere that this might be so.