The next pre-release of the eagerly awaited Windows 7 is now out. It can be obtained through the Microsoft website (http://bit.ly/Ovq8H). If you are interested in upgrading from build 7000 I would advise that you hurry up and download it before they decide to limit the number of downloads.
A quick word of warning to those who followed my triple boot tutorial: reinstalling Windows 7 is most likely going to overwrite your MBR and remove Grub which means you won’t be able to boot into Ubuntu or OS X. There should be directions online on how to reinstall grub. I will update the post later with a link to such a tutorial.
*UPDATE* As promised, here is a tutorial from Fosswire which walks you through rebuilding your GRUB bootloader after installing Windows 7.