Eric Enge Interviews Yahoo's Priyank Garg has an extremely detailed and educational interview with Yahoo's director of product management for Yahoo! Search Technology. Priyank Garg is a great guy - I have known him for the past couple years at least and as you can tell from this interview, he was very forthcoming with information.
We have two forums dissecting the interview, one at WebmasterWorld and the other at Cre8asite Forums. I'll isolate the main discussions around this interview in bullet format:
- Footer (bottom page links) may not be used for ranking purposes, but will be used for crawling and discovery
- Yahoo uses both human and algorithmic approaches to detect spam and fight spam
- Some spammy sites will still be included in the index but won't rank well, outside of navigational queries (like searching for the site's name)
- Yahoo doesn't automatically discount paid links
- Links in quantity are less important these days
Those are just some of the interpretations of the interview. It is worth reading in its entirety.
Forum discussion at WebmasterWorld and Cre8asite Forums.