How do I make the images on the "blog" page automatically scale to thumbnails?

Hi Guys,

I want to post full size images in the individual blog articles but I would like the "blog" page (that displays all the articles in series) to automatically display thumbnails instead of the fullsize images. Is this possible? Perhaps Difficult?

Here's the "blog" page that I'm hoping to have images automatically display as thumbnails...
http://hiltondesign.net/saskia/stories/

hoping the holidays find you well,

Cheers,

Ian

by the way, you guys are worth your weight in gold!