I decided to leave the source code out of the .jar file, because in the first place I thought there would be nobody interested in it, and also that source code should be separated from the application, then I convinced myself I should at least create a repository.
The first repo I managed to get working is on GitHub at the following address: https://github.com/ron190/jSQL-Injection, it is few months old but I don't know if anyone used it (frankly, I didn't myself :).
And now I finally created the google code repo, so if you are a coder and you are interested in the GUI components or in the injection process, I invite you to comment directly the source code in the repo.
Surely if there is one repo mostly used among the two, then I should delete the one the least used. Also SVN/Git/repo is kind of new to me so I don't know if it will be successfully used (I think I discovered it first with metasploit, and I found it very powerfull).
The code was not intended to be public at first, so I didn't comment it much (and that's bad), but soon I may do a pass in the code to add comments/explanations.