After some trial and error with Yahoo Pipes, and a refresher course in Regular Expressions, I have now added thumbnails to the ‘Best of’ links on the Inspiration page. Not sure about the size though, 50 x 50 pixels is the default size for this theme, but it seems a bit small to me. I’ll look into the possibility of making them larger.
Update: I have made the thumbnails 75 x 75 now. Much improved, I think!