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You are dealing with the Directory, that is not what was being talked about. This week we should see an "add url" link somewhere on Yahoo Search (something like [addurl.alltheweb.com...] ) where you can add your URL to a list of sites for Yahoo to crawl. Tim said this would appear this week, so there may be as many as six more days to wait.
My guess is that to keep people happy they will be crawling the web quite a lot and indexing a lot of content for free. I do think that a lot of this crawling will be of informational, non-commercial content. However, they might be adding a few commercial sites as well.
I have a few sites ranking in Yahoo search for commercial listings that we never paid for.