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I just thought I'd provide a resource for my users to find more information about the topic my website covers.
Hi Psycho,
You'd be providing a service if you picked what you thought were the very best of those 100 sites and only linked to them. I never feel I'm being given very good service when I'm presented with a large, undigested (and undigestible) collection of links. Show them you know what you're talking about by giving a short review of each of the selected links. That way you'll also have content that is useful for people and spiders.
And IMVHO PR drain is vastly overrated. Linking to other authoritative sites from my index page hasn't harmed me at all. In fact I think it's helped in terms of establishing my site as a hub.
I'll pass on the humility, but I will take a piece of that opinion, which strikes me as very sensible. Google is _not_ the only game in town; there are algorithms that place extra weight on hubs -- not to mention that an authoritative hub is going to have an easier time getting disinterested links from other webmasters.
To the original question: there are several ways you can copy the ODP data to your site. But if you aren't adding "value" to the listings, why not just link to the directory.google.com version?