Just realized I have over 40k pictures on flickr, and very few of them are properly tagged or organized. @flickr it's time to update your organizr app, and also make it available in your iOS app, because this is painful.
The brilliance of twitter was the focus on doing one thing, microblogging, really well. It was easy to explain and use, which made it successful.
Perhaps having such a clear vision of purpose limits useful expansion or advertising opportunities.
But it was great.