I have to agree to the above. I'm using a 1920x1080 monitor and even in fullscreen, your page doesn't fit entirely. Most websites try to fit 1280x1024 monitors, which are a dime a dozen, especially in the workplace, where I hear quite a few people surf the net.
EDIT: I could barely enter the portal on a 1280x1024. I clicked on the yellow "c" at the far right edge. I couldn't see any way to slide the screen over to be able to read the full link. At lower resolutions like 1024x768, it's likely no one will could enter it.
EDIT: It loads fine using IEv8 on 32-bit XP.
OK, I entered the site. While a horizontal format is kinda unique, it also makes it impossible for me to scroll down with my mouse wheel. I've had to use the slider on the bottom. Some people won't mind, others might get annoyed. I think if you included left and right arrow buttons on the sides for ppl to click on, it would make navigation easier.
It looks fairly nice, I'm just commenting on ergonomics.