Jorge wrote:

Some people have written me expressing their will to join as developers. They have introduced themselves, asked questions and for some advice. I've answered, hinted and made suggestions. Since all of them have remained silent, I wonder whether they are concentrated studying the code, or simply changed their mind...

Maybe the answers/suggestions should always go on the website somewhere so that you don't have to repeat yourself to people who just disappear. [So much ink has been spilled in the free software world over the years about being very very welcoming -- usually in the context of why women have better things to do than contribute to free software -- and I can really see now why those involved in projects might not roll out the parades and fireworks until seeing attempts at patches or at least detailed discussion...]