I've been designing and coding div layouts on MySpace for years and I've helped a lot of others learn along the way. Both of which I've got down to a science. I've written tutorials and answered hundreds of questions in forums, notably on skem9.com and feedthedragon.net.
I recently released a div layout template system for designers, I did all of the hard work - coding it for you. All you have to do is copy and paste with minor CSS edits and design away - Phoenix