Here is another link for SMD components suggested ny Herctrap. As a matter of fact, Hercules (aka Herctrap) has began working with SMD chips, and he is currently building his stock in SMD components and (as i understand) in SMD documentation. He has already prepare some cool professional PCBs based on SMD chips (hopefully he will post some of them in the site). This time, he sent me a link with SMD resistor sizing. Most interesting part is the bottom of the page which has the power rating for each package.
Here is the link for the full page.