Growth in monthly unique log-ins is slightly outpacing the growth in user base and suggests growing usage of the service by users.

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Online service Nextworth.com also allows in-person trade-ins at some Target stores for a Target gift certificate.

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When the Department of Homeland Security was created as part of the "war on terror, " the old Immigration and Naturalization Service (INS) was subsumed into the agency, and the repackaged bureaucracy was put back in the loop (the State Department is the access point for visas).

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The most recent of all the filings is one for "Nooksellers, " which appears to be for a combination in-store kiosk and online service that would offer personalized recommendations and various social networking tie-ins.

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Notably not in attendance (or at least, not visible at the event) were location service startups Foursquare and Gowalla, much of whose value lies in the rich database of check-ins they are sitting on.

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