Reduce/eliminate the crud. For example you have 71 images on your homepage, remove what you truly don't need and put the rest into a sprite.
BTW is your site/forum the official support site for Castle Story? Not trying to tell you how to run your site/business however most support sites don't run ads as they have an alternate revenue stream (their product). IMO small return on the ads probably isn't worth the extra pageload time added, along with the extra "crap" it adds to the site.
I'd suggest temporarily disabling the adds and Facebook widgets and then re-running this test. I have a feeling that removing those two items will drastically reduce your homepage load time.