Thanks a lot. I am glad you like it :) Facial recognition algorithms is a nice topic, maybe I should. However, I would like to keep the formula of giving people both knowledge and tools to play and it would be a bit hard in the mentioned case (one article could be not enough :) ).
I have several topics in my mind already. Some of them are more informative, others are plain hacking. I have to think about it. Feedback from this one will probably help me to choose the direction.