I sometimes find the moving web page ads annoying when trying to read an article. With the arrival of Mac OS X 10.4.7, you can easily put a temporary stop to the motion while reading a page on your MacBook or MacBook Pro.
Simply set your trackpad to "Tap trackpad with two fingers for secondary click" (in the Trackpad tab of the Keyboard & Mouse System Preferences panel). Then, to stop a motion ad, click on an unused portion of the page with two fingers to bring up a contextual menu. This freezes all web page motion. Read your page in peace, and then tap with one finger to release the menu and resume normal display of the page.
Mac OS X Hints
http://hints.macworld.com/article.php?story=20060719092225722