As part of our process to open BibSonomy up for developers, we have re-designed the BibSonomy start page at Bitbucket:
The three blue boxes provide quick access to pages about developing for and with BibSonomy, integrating BibSonomy with other tools and services, and using BibSonomy for research. They help you to easily find the information you need. The three grey boxes at the bottom provide further information, e.g., news about BibSonomy, who's behind BibSonomy, and where to find help.
In addition, the API documentation has been greatly improved during the last weeks. All developers definitely should have a loon on it and on the other relevant wiki pages.
Have a look at the new page and as always ... happy tagging!