I worked rel hard on this and love it. I am trying to add an animated cursor to it that I have used on HTML sites before, but not sure how in Mambo.
http://www.circusfun.net
I think the only things I'd improve is make the color transitions a little smoother (the colorscheme itself is great) and remove the horrible white pixelation/aliasing on the logo...
Pixelization is gone now and the gradient I am pretty happy with. If there is a specific area you think needs attention I am always open to constructive criticism.