Well, this can be filed in the “what took you so long” category, but flickr finally has a twitter account and has finally created the functionality for integrating flickr uploads with your twitter account.
The twitter account for flickr is brand new but hopefully it will be used to interact with others. Currently there are just a handful of tweets. And so far, flickr hasn’t followed anyone back. They don’t have to, of course, but that is generally the best way to interact with other users.