Here's the site I'm working on: http://rockwellhouse.co/wordpress/
I would like the main content to disappear at the black line that stretches across the top of the page when you scroll down the page.
It could be done with some CSS tweaking. Go to line 18 of your style.css and change the rules for div#head:
* I also changed div#head to simply #head as that is an ID and there is no need to use the tag too(it is recommended for better performance too).
ooooh! nearly did it! I'll tell you what! this HAS helped. As I can change the logo! Cheers!