This is pretty cool.  If you have some e-mail subscriptions that you'd rather view through RSS, NewsGator allows you to do that.  Basically, you set up an e-mail address through NewsGator, and it publishes e-mail sent to that address as an RSS feed.  Then you just change your subscription to use this new e-mail address.  You can keep the feed private or make it public if you'd like to share it with others or make it available to an RSS reader outside of NewsGator.

Gotta be a NewsGator subscriber to get this feature.  Read the details here.