My main page has a whole set of links to other profile pages of mine (e.g. LinkedIn, Twitter, etc). Lijit views them all as part of my blogroll. What I'd suggest is that you parse the linked-to page for any incidence of the linking url and see if there's a rel="me" in the anchor tag. If there is, you can infer that this is a profile page of mine rather than a third-party blog.
What's cool about this is you'd be embodying Brad Fitzpatrick's concept of the portable social network. You've already recognized the hidden value in these links and the content behind them, now you can add on a layer of smarts about what they are.
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