Ok, here goes, from the point of view of a new visitor:
It's not immediately obvious what this site is offering. UltimateWebNetwork is a meaningless name, and there's nothing I can see that gives a concise idea of what it's for.
Underneath the "login" section there are five icons which I can mouseover, but I have no idea what they're for because they don't have titles or change my status bar.
Why is there a login section underneath the login section? In fact, why have a login button on the top bar too? Why call it "register" in one place and "sign up" in another? Pick one and stick with it.
What's with the links on the right hand side at the bottom? I have no idea what they're for.
The big login section with the mystery icons underneath it is sticking way out the right hand side of the page, overlapping stuff and looking messy.
The shadow effect you have to the left and right of the central column would look ok if either the content or the page background was a different colour. At the moment it looks like a drop shadow in the middle of nowhere. And it doesn't quite reach the footer - there's a gap of a few pixels which looks sloppy.
Yes, I could find out what these things do by randomly clicking them and making notes, but I, as Joe New Visitor, do not want to do that.
I was using FF3. Hope this helps