You dont need to use a comma when using "and" and "but" its optional.

You know someone really needs to do an article on why the camera on the iPhone 4 is so good! I have a EVO and since I upgraded my SD to a class 10, Ive noticed improved photo and videos but even with 8MP, cant compare to the iPhone 4. Also my wife's focus running WP7 suffers the same fate.

I'd have to put in Daemon and Freedom by Daniel Suarez.