I just completed a major UI overhaul of my website. As part of the overhaul I added a pull down menu at the top right of the sight. I was trying to get a similar effect to this web site http://www.virtuallyghetto.com/ , and I was trying to do it with pure CSS.
I am not going to show how to do it in blogger.com but rather just a simple web page and you can take if from there.
I left a red border around the main section to help me when placing it on my page. After I got it where I wanted it I removed the border. I could go over in agonizing detail how it works, but I am not going to on this one. To me it seems simple and short enough to copy, tweak and poke at.
One small detail though is it draws the pull down -9999 pixels off screen then moves I back when you hover over it.