Verrrry nice and CLEAN. I really like the fixed-width. It fits the whole theme nicely.
I was actually initially a bit confused as there didn't seem to be a header. Your banner and nav bar almost have the same shape as the websites you're showing off, so it looks like another web site that you've done.
So possibly add some sort of devider or something to make that stand out as something seperate.
Your "Top" thing is really neat, too. It's the perfect speed :-S
Is your facebook link supposed to direct you to a blank anchor?

Currently it is:
CODE
<a href="#">Facebook</a>
Might want to fix that. :-P
Oh, and I agree with uhh... whoever mentioned that you need a favicon. It doesn't need to be anything fancy... Just add SOMETHING. When I bookmark things, I like to be able to identify them by their favicon. Even a simple 5 minute job would be better than nothing...

(Sorry, I got bored :-S - (btw that took 4 minutes - You could probably do something 10x better in 5 minutes. LAZY! :-P)) And even something as simple as that will help people identify your site if they use bookmarks like I do (I just have the icon on a toolbar in my browser)
Sorry I'm kind of going on forever, but I noticed another thing... Where you write your clients' names, it seems like you'd link to them... (I actually thought those were links, and I clicked them several times before I realized they weren't :-P)