This thread seems to deal with the same issue (amongst other things): http://forums.sketchucation.com/viewtopic.php?f=15&t=14353&p=108605 It seems not, which is annoying. I'm going to see if Layout can do something for me.

I'd welcome this as well. I've developed my own manual work-around to essentially create my own images and substitute them for the ones created by the Sketchup web-exporter. Once you generate one web export say for 36 images you can re-use the html code multiple times and simply replace the images with those that you create on your own. see my post here: http://www.sketchucation.com/forums/scf/viewtopic.php?f=180&t=10855