Its clean which is what i think is most important.
Color scheme is a problem, the orange is very destracting I would say take the soft blue from the Tuts and use that instread. I find my eye is lead away from your info and towards the headers.
Second your tuts should not change layouts. I recommend taking the PHP layout and using it for all of your tuts, simply b/c it is easier to look at.
other than that It looks very good
Although it still needs your personal touch. It kind of looks Templated.