They (Google) say that Yahoo now supposedly joined in the borg collective to adhere to nofollow.
Yet, when doing a Yahoo backlink search, the results still show links to a site that come from a nofollow link.
Without knowing Yahoo's algorithmic nature of crawling, indexing and ranking very well, it brings up the question of exactly HOW google and others follow the nofollow rule. Clearly in Yahoo's case, a nofollow could merely diminsish the ranking value, but not stop the flow of spidering and indexing.
My question is, does Google adhere to nofollow the same way? Because they
rubberstamped Yahoo as being one of the SE's that "supports the initiative". And by saying that, they're essentially saying that whatever Yahoo's method is, it's fulfilling their purpose of nofollow.