Just as you have Twitter integration for sharing stories and avatar selection, please implement the same kind of integration for identi.ca (http://identi.ca).
Identi.ca uses statusnet, which is free and open source software, and supports an API. The API is Twitter-compatible, so it shouldn’t require a lot of effort.
This has been suggested before, but it’s not a free feature. It needs to be designed and developed, as well as supported from here on out. And it looks like very, very few people have even heard of identi.ca. Sorry, but until it hits a level of mainstream, it’s just not a priority. For now.