Eric and I have changed the look of GUS. Eric wanted a "less loud" impression so we toned it down. We still want to do do some work with the logo and header section, so that likely will change too at some point.
It's tricky customizing a site here at Wikidot because the sites are predetermined templates that you tweak with something called CSS code. The CSS helps control the appearance and control the Wikidot layout to a degree. So while there are some things that would be nice to change, it may not be possible or too technically difficult to change.
Also, I found that some things do not look right in Internet Explorer, especially IE6. IE7 seems to be better, but Firefox looks the best. The Wikidit FAQ suggests Firefox as the preferred browser. That's because IE doesn't always render CSS according to the rules.