That link will work
Microsoft has made Lookout 1.2 available at the link in the previous post. I'm not sure if they've made this decision because it was part of their acquisition strategy all along or because of all the complaints bloggers (including MS bloggers) made about the short-term decision to make it unavailable.
It's a great tool for Outlook users and you should definitely try it out if you use Outlook. The impact on a GTD workflow when you can find anything in Outlook in seconds is extraordinary and can fundamentally change the amount of time and approach you take to processing your digital information.
There's been a tremendous amount written about Lookout. My blogs have a number of articles about how Lookout has impacted my approach to GTD. If you do a search at Feedster.com for GTD and Lookout, you'll find all the justification you need to add this tool to your kit.