wow factor

If reduced clutter and easy reading is what your after then TidyRead has been released as a Firefox Addon. Note: it is still at experimental stage.

The overlay method makes it easy to use for articles and has the benefit of hiding all those online advertisements.

Arc90 - Readability

It cleans up a page and presents only the content worth reading in a customizable “reading view.”

Visit the Readability Preferences site, establish an "eye comforting" setting and add the bookmarklet to your browser.

A cool Arc90 Labs give away.

Flex framework Arc90 lab : CollapsiblePanel

Unfortunately, the Flex Framework doesn't actually contain a collapsible panel. We moaned and groaned, and then built our own. Now we're offering it to you for nothing, because, well, that's how we roll.