Hi I have just written a JavaScript bookmarklet tool which allows selective removal of web page elements including ads. It works via a simple tooltip interface which you just click on to remove the element. It also has a pop-up menu listing the container element heirarchy which allows you to remove whole sections of a page in one click, and it supports a Ctrl-click option to remove all elements except the current element (or container). With these functions it makes it quite easy to clean up a page, and to remove elements for a print out or for saving locally.

I created a web site for it and a video at :-
www.web-declutter.com

It works on all major browsers, including older versions (even IE6). Give it a whirl, let me know whether you find it useful or have any suggestions for improvement. On Chrome just drag the install buttons onto the bookmarks bar and away you go.

The four basic functions are :-
Remove Element (click)
Remove everything except Element (Ctrl-click)
Remove Container (click)
Remove everything except Container (Ctrl-click)
(The class/id shown in the tooltip indicates which is the right element to remove).

Plus, a 'quick' version to remove all Flash elements.