i do a fair amount of web design, both for the team, and for hire. I have tracking code on several websites. It it extremely rare to see more that 5% of traffic come from lower than 1024/768.
even so, i usually write websites with a max width of 1000 px, to account for window borders, and scroll bars.
if i were you, i wouldn't worry so much about viewers with less than 1024...
btw, great site, but, i wouldn't have the intro page if i were you, it makes it take longer to get to the actual site.
Here's my team's site:
http://www.riverdalerobotics.com/
feel free to grab code or css, as long as you give us credit for what you grab (just put credit info as a comment in the html)
also, a great way to see how the site looks on a ton of browsers is:
http://www.browsershots.org
if you create an account, theylet you take more screenshots. i've found them extremely useful, since it's not possible to have every browser in the world... (unless you're them)
hope this helps,
-Z