I'm really happy to announce that after careful consideration, I have decided to open source AstroBin.
The source code available at the following BitBucket repository: https://bitbucket.org/siovene/astrobin/src/.
The code is licensed under the Affero General Public License.
I will personally coordinate the efforts of the people willing to contribute. I came to realize that the list of things that need to be done is much larger than what I can do by myself, so it's for the best to put it all in the hands of the community.
The issue list is vast, as it's visible on BitBucket.
Please get in touch if you wish to contribute, and together we can make AstroBin better and better!