With the release of Version 3 back in early March, we added a new feature on Profilactic that we referred to internally as "auto friend." Basically, if a site you add on Profilactic has a feed of your friends' content from that site, we'll automatically pull it in to your Friends' Mashup. No need for any of those friends to have a Profilactic account.

Of course, as with any of your friends' feeds, you can toggle any of the "auto friend" feeds on and off from the Manage friends' mashup page (select My Tools > Manage friends' mashup from the site header). This lets you tune your Friends' Mashup so you only get the content you want.

I realized recently that we a) haven't done a great job of getting the word out about the feature and b) haven't listed the sites that use it.

Sites that we automatically pull your friends' updates from:

1. Blinklist
2. Blippr
3. Delicious
4. digg
5. Facebook (very, very soon)
6. Flickr
7. Ma.gnolia
8. Propeller
9. Technorati
10. toluu
11. Twitter
12. Vox

We're going to be adding more as they become available. Look for FriendFeed support very soon.

If there is a site that offers a feed of your friends' content that we missed, drop us a comment. It was tough going back through 160+ sites to get them all.