Happy weekend!
As described in one of our previous posts, you can export your publication references for use with the Citation Style Language (CSL). Now, BibSonomy's API also supports CSL.
Using the API, you can get access to most of BibSonomy's features programmatically. You merely need your user name and API key (which you will find on your settings page in BibSonomy). The API and different ways of using it are comprehensively described in the documentation.
Happy coding!
.folke