You can see the work in progress on the new MSN portal at http://x.beta.msn.com. I like the fact that it's uncluttered and easily customizable, but it seems a little too lightweight at this point. The site should grab my attention towards the most important stuff on the page (as determined by the user), and it doesn't do that at the moment.

Also, you can check out a more experimental MSN portal at http://www.start.com/2/ and http://www.start.com/3/