I think it is rather plain. I'm not sure if you plan on changing that or not. It almost looks as if the page has no real structure. I'm not sure what you were going for but i think if you still want to keep it plain, just maybe a background color to the content(silver-ish/gray).
Maybe where you have that picture of an airplane on the top, you could get more images and make them randomly load a different each time you go to the website/page by using http://www.jscode.com/js_random_image.shtml
Yeah, i also was not fully aware of what the site was about. The site isn't finished so i can't really review it if is lacking content. Once you accomplish a little more we all will be able to review it better i'm sure.