Michael Arrington reported yesterday on the launch of a new service that tracks the relationship status of your MySpace friends called SingleStat.us. The service will automatically send you an email whenever your friend's relationship status changes, so if a friend switches from dating to single, single to married, or married to divorced, you'll be the first in the know.

Here is an example notification email you'll receive from Singlestat when a friend's status changes:


Basically, SingleStat.us has created an email based RSS feed for only section of MySpace profile pages. Rather than syndicating blogs into your favorite RSS reader so you can easily track what's new, SingleStat allows you to track the public changes to friend's private lives. Dave Evans takes a look at what he calls the "social networking cottage industry" on his dating insider blog.

While this is kind of fun, why not take it further:

1. Allow people to subscribe to all (or selected) changes to their friend's MySpace profiles.

2. Why just MySpace? Why not track changes to your friend's profiles on other sites as well? One where you can do this today is Flickr, which allows you to subscribe to your user's public photos via RSS.

3. Why limit this to personal information? Would you like to receive a notice whenever a competitor made a change to their web site? Or politicians could use something like this to keep track of happening on the other side of the isle.

Automatically Track Your Friend's Top-8

FeedYes.com allows you to create RSS feeds for content that doesn't have feeds by default. It tracks the changes and reports them to you through your favorite RSS feed reader. As a test, I set up a MySpace Top-8 RSS feed for Britney Spears. Here is the RSS Feed URL if you want to give it a try:

http://www.feedyes.com/feed.php?f=10LujcN2D68Vse0h

Here is what it looks like in Bloglines:


I'm not sure how you could track who gets the boot. Will Britney's Baby's Daddy slip from Brit's top-8? Now you can keep up to date without refreshing Brit's profile page all day long.

Have you set up any non-feed feeds? If yes, how have you used them?