Why is that join button so huge? It scared me for a minute.
Your nav button text is faded looking on my screen. You should try another choice of font color or another font face for the text. What are you using to edit your images? Why are you using several different fonts on your buttons?
Ex: Link partners, terms of services.... is it me or am I right?
You should put your copyright under the bottom banner.
You should also link the header image to go back to the main page. A lot of people have the tendency to click the header. I'm good for that on all the sites I go to.
Overall.... nice job.