I did some really quick photoshop jpeg conversion of the header image and background image to get the file size down quite a bit. The header image is down from 647k to 74k and the background image is down from 255k to 21k. The files are attached.
This should speed things up quite a bit. Speed is important! People will leave before your page loads and search engines will drop you from their results if your site doesn't load quickly.
Hope this helps!
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