Samples of facebook ads and the change that the new facebook timeline layout has on the facebook ad space.
Old Facebook Layout with Traditional Ad Space
New Facebook Layout with Slimmer Ad Space
Side by Side Mitt Romney Ads
Image size in facebook ads are 110 x 80.
Full post on Dream Systems Media : http://www.dreamsystemsmedia.com/blog/index.php/facebooks-new-layout-changes-ad-space/