We've just launched a new feature that makes it easier to follow your
friends' shared items in Google Reader. Check out the announcement on
our blog:
http://googlereader.blogspot.com/2007/12/reader-and-talk-are-friends....

The short description of it is this: If any of your friends from
Google Talk are using Reader and sharing items, you'll see them listed
in your sidebar under "Friends' shared items." Similarly, they'll be
able to see any items you're sharing. You can hide items from any
friend you don't want to see, and you can also opt out of sharing by
removing all your shared items. For full details, check out the
following help articles:
http://www.google.com/support/reader/bin/answer.py?answer=83000
http://www.google.com/support/reader/bin/answer.py?answer=83041

This is still a very experimental feature, so we'd love to hear what
you think of it. Thanks, and happy sharing!

-Graham