Ok, based on suggestions from communities all over the web, I've made some changes.
Several people didn't like the FF logo as it was (square with a white BG). I've now changed it so that it is integrated seamlessly into the gray BG. Better?
Several people said that the Google search field was too large and overlapped to the right on certain resolutions. I resized it. Better now?
Nearly everyone hated the old RED text because it was hazy and hard to read against the gradient BG. I changed all the text to white and increased line-height so it's a little less cramped. Better now?
Still working on other things, but what's the verdict in the meantime?
Thanks, everyone! This has been invaluable.