Color palette's good. Some folks will no doubt bitch that the beige type on a grey background will be hard to read. It's OK to me, though.
However, the height of your design is too tall. I have to scroll to the bottom to see all of the live area. Also, whenever you hit anything in the main nav -- like company, services, portfolio -- you have to wait for the upper portion of the site to refresh (the flash work to do its thing). I'd look at figuring out a way of having that feature work when the home page comes up on the initial visit -- then keeping in place after that.
There's a book that came out earlier this year. It's called "Call to Action" by Bryan and Jeffery Eisenberg. It's something like $15 from Amazon. These guys specialize in web site conversion -- and are really, really good at it. I read this book during the summer -- and completely overhauled the design of my upcoming e-commerce company's site as a result. My web designer quit on me over it -- but I'm in business to make money -- not to have people look around and leave. Good luck. Great idea to test your site out before launching.