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Further, if you make use of FriendFeed’s options for organizing your friends, you can specify that you’d only like IM updates from a specific group of people. This should go a long way in making the feature useful without overloading you with constant updates, especially if you follow a ton of people on FriendFeed.
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Perhaps the most interesting feature for me is the IM commands that FriendFeed has included with this update. For example, if you’d like to post a comment on a new item, you can simply type “@N [comment]” (where N is the item number you're responding to) and it will be automatically posted to that item back on the Friendfeed site.