I see you've made the navbar transparent too... looks nice.

Now, to get your links visible (currently WHITE - #FFFFFF)

Find:

#navMain ul li a, #navSupp ul li a, #navCatTabs ul li a {
text-decoration: none;
padding: 0em 0.5em;
margin: 0;
color: #ffffff;
white-space: nowrap;
}

and change color to #8B8B8B

(This shade is colse to the grey in your logo.)