Ander00,
I like your cards. I was searching the wonderful web for exactly what you have. Will you be incorporating ALL powers, feats, features, items, and rituals eventually? I tried making my own through MSE, but I don't think I'm doing it right. I have my own custom character sheet in acrobat that is still being fleshed out and your cards make an excellent complement to it. By selecting the cards I need and printing them to pdf I can combine them with my sheet for each character and... Awesome!
EDIT: What's really nice is that if willing to invest the money, they can be printed on heavy weight paper and cut out and laminated.