There are a lot of emerging designers and developers in this OPENSOURCE world. Well here is considered one of the big developments today, FRAMEWORKS! Guide to programming nirvana from NETTUTS.
Have you heard NETTUTS. From Envato, they have this series a Framework Tutorials its on its early stages of the tutorials, since they have only two for the moment. Nonetheless, here are the Tutorials
Enjoy the 2 Tutorials I will update you for the rest!