Well the whole site is looking good but the banner has gone out of the site lol
Change it
Fit it according to the space
for example, put this TAG
<img src="URL" title="Area 51 Downloads" height="200px" width="??px>

Try various combinations for width="??px"
I think 1000px would fit on your site..
Just try to fit it
1000px if not then 900px if not then 950px etc...

Rating :- 7/10