Microsoft Office just RTMed this week, which means in a couple of months people will be buying them on stores and it will come installed on their new PC.
The great news is that Outlook 2007 has embedded support for RSS. This is a super easy way for people to subscribe to their favorite blog/site without knowing a thing about feeds. Great news.
The bad news for blog owners, developers and marketing people is that you won't know when a user visiting your site to get a feed is using Outlook 2007. That sucks!
I found this post from Michael Affronti, a PM on the Outlook team, who gives some lame excuse why they cannot change the "user agent" string for those requests.