Eric Enge, Recently we had the chance to speak with Tim Mayer about Yahoo's Search Builder product.
Search Builder is the vertical search engine offering from Yahoo, that competes with products such as Google Custom Search Engines, Live Search Macros, and Eurekster.
In the discussion, Tim reveals that sites that use Search Builder on their site may well increase the number of pages on their site that get indexed by Yahoo. It amazes me that there has not been more play regarding this point. It seems to me that I see people complaining all the time about the number of pages that they have in search engine indexes.
So here is one quick answer: implement a Search Builder search engine on your site. I would love for someone to try this on a site that has a limited number of pages in the Yahoo index and see if it helps.