Thanks for the suggestion, but I don't consider photo sharing services very helpful for 1:1 picture exchange. And I heavily doubt I could persuade anyone to sign on to such a service only because my N800 isn't capable of making anything useful out of these tags. They'd consider this my problem, not theirs (and rightfully so).

The only thing I could do is upload them to a geo-aware service myself after receiving them (and in fact, that's what I do now if I really want to know), but that's a really clumsy workaround.