Well, there you have it. Now you can position things on the page, to the exact pixel. But please remember that people still have monitors and browsers that are different sizes than the one you are currently using. Another thing to keep in mind is that absolutely positioned objects do not cause the scrollbars to appear if they're off the page. That means people who have small monitors won't have any way to get to it. It's important to use good judgment.
And for the few folks who are going to pipe up in defense of layers, please consider this: CSS positioning works on the current version of both major browsers, and is still in consideration by the W3C. Layers only works on Netscape Navigator 4.0. If you intend to make pages that are seen by as many people as possible, and you want to make just one document, CSS is your best bet.
But since there are still innumerable legacy browsers out there that don't support CSS or positioning, and since people still demand that the pages look good, I've got to get back to hacking away, using tables to lay out pages much like this one.