The big time users (GET dropdown_arrow.png 304 Not Modified mydomain.com 1.7 KB 184.108.40.206:80 484ms ) appear to be the graphics. I an betting they are not compressed. You can burn 80-90KB on a single small image or as little as 6-20KB for the same visual quality.
That and the total requests 47 requests 833.4 KB (796.2 KB from cache). A single page with 833.4 KB is a pretty large page.