A couple days ago I noticed that FriendFeed added comments, meaning that you can comments on items that appear in the friends' feeds. Here's what it looks like:
That's pretty cool.
Basically, it means if you looking at my friendfeed, you could comment on a given item or indicate that you like it with a single click.
And if you haven't seen FriendFeed, it's a service that takes the Facebook activity stream idea and implements it across a bunch of services, including Google Reader, blogs, del.icio.us, Digg, Flickr, Furl, Twitter, Reddit, Netflix, and more.
I suppose there will be a standard way to syndicate and aggregate this stuff someday--probably something like Atom or RSS. But until then, it seems that FriendFeed has the lead in this area.
Also noted: the new FriendFeed bookmarklet
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