Not that I'll ever use it, but it looks like Microsoft is supporting the use of OPML subscription lists in Outlook 2007. I tried NewsGator's Outlook extension, and I think Outlook is the worst conceivable way to consume the large volume of information I have in my modestly sized subscription list. But at least Microsoft is going to let Outlook users get their subscription lists out of Outlook (and into a better aggregator). They even have a step-by-step guide for exporting your RSS feeds from Outlook.