This article from Russell Beattie makes me wonder if and when this will really take off in the mobile space. I wonder about how many mobile users will 'tag' all their own (individual?) user generated media as it will take quite some time. And as we all know time is a scarce resource these days. Additionally, the bandwidth costs on mobile networks at this moment are too high to make this a big market. But in the long run I do see value in this as it is effective shortcut to getting specific media from your friends in your social network (MoSoSo). That special picture or video from the wedding, party, event, birthday, holiday trip, etc. And this might be valuable in tandem with the upcoming tangible interfaces. Mobile P2P search in case you missed sharing on the spot when the media was created and tangible interfaces for sharing that immediately.
"This would be so easy to mock up with Series 60 phones: Create central index site "neatomobilesearch.com" and then whip up a Python script that goes through the normal data repositories (image, video, messaging, documents), indexes what it finds and periodically connects to the server to upload its results, and also see if there's any pending requests that it needs to fill. If the script connects, and it sees a few requests for files (from a search), it then uploads those files as well. And like I said above, the search interface could be based on some sort of social network or it could just be based on what I decided to make public or not."