Resurrecting this dusty skeleton of a thread to post the solution to the issue (in case anyone else stumbles across this thread first as I did).
http://duc.avid.com/showthread.php?t=346568
Long story short, if you add a handle size to the Normalize AudioSuite plugin, it will scan and normalize every clip individually.
If you don't want a handle, and you want the resulting normalized clips to all be whole files in your timeline instead of clips of the whole files minus the handles (really clutters up the clip list), just deselect "whole file" in the normalize plugin settings (so it's gray instead of light blue), and make sure the handle size to the right of that button is 0.00.
You can also make this the default for other plugins by changing it in preferences>processing>AudioSuite. Then every time you use an AudioSuite plugin with a bunch of clips selected, each one will be processed individually, and you'll end up with whole files of the clips in your timeline.