One thing I would be doing it trying to fit it all into one page/screen. There isn't much info on that page, so I don't like the fact that even on a big screen with a high resolution, I have to scroll down to see it all. You could easily fit all of it in even an 800 x 600 window.
I'd make the buttons smaller, use a font like arial on them, and arrange them either horizontally, or set them up vertically in a column on the left (or right). They don't look right centered and vertical as they are.
I'd decrease the font size on your disclaimer.
I'd try to do something to separate the sections a bit more as well. EG some kind of background behind the banner (Welcome to..). Do something to dress to dress the banner up a bit in general. Basically just try to give it some structure instead of it looking like a group of elements stacked on top of each other in a plain single vertical column.
The logo RoninXI linked is much better quality than what you have used as well. That would help the look of the site a ton.