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If you are lucky enough to have a Yahoo listings where all the regional Yahoos all use capital letters all the time, you will have a really great link in terms of PR for that industry.
GoogleGuy once posted that for ODP links, they are treated the same as any other page. Thus, link on a teenager's home page with PR has the same weight as an ODP listing, assuming an equal number of links on both pages. I see know reason for Yahoo to be different.
(And, yes I am aware of the issue of regional Yahoo's, and that an ODP link also will eventually be counted when it makes it to the Google directory.)