SEOPTI - 1:24 pm on Oct 11, 2010 (gmt 0)
MC recently confirmed nofollow links do not pass PR, do not pass trust, do not pass anchor text, they are useless. So I won't go ahead and spam twitter with my automatic feeds or create hundreds of facebook profiles. It just makes no sense if a product is not unique.
Creating forum profiles is a better strategy, your site gets trust.