Don't do this on your own pages. It only makes you look like a 14-year-old girl with a brain the size of a virus.
Page transitions exist in Internet Explorer because PowerPoint uses IE in the display of certain slideshows. Either way, it's still dumb.
The gradient background will probably be lapped up by all those damn teenage girls with "domains." Then it'll make you look like a little-brained girl.
Colored scrollbars often end up creating a WTF? factor for those not in the groove with domain heads. But they are not as big a problem.
This stupid image alpha trick will break in other browsers, and it might end up in the Teen Domain Head's Idea Book, only available through Amazon.com's patented one-click shopping method.