Why did I subscribe to this feed again?

I often subscribe to a feed and cannot remember why.  I’m not saying they are bad feeds or anything – but sometimes over time I realize that they aren’t talking about what I am interested.  But before I cut the feed I would like to have that reminder of why I subscribed to them in the first place.

This should be easy enough to track with a web-base RSS readers.  Look at the referring site, log the URL and then remind me when I ask you to.