• FriendFeed (www.friendfeed.com):www.friendfeed.com Founded by a handful of former Google employees in 2007; bonus features include stats and a function that lets users keep track of feeds of contacts who don’t already have a FriendFeed account.
• Yammer (www.yammer.com):www.yammer.com Originally launched as a Twitter -like microblogging service for businesses, it now includes lifestreaming capabilities, including allowing users to import, share and discuss RSS feeds.
• Profilactic (www.profilactic.com):www.profilactic.com Among the first social aggregators (founded in 2006); bonus features include a huge list of supported services, as well as the ability to automatically pull in friend/contact lists from various services (rather than requiring users to add them manually).
• Socialthing (www.socialthing.com):www.socialthing.com Acquired by AOL in 2008; lets users choose who to share updates with on a per-service basis; has a version that is optimized for iPhones.
• Iminta (www.iminta.com):www.iminta.com Gives users the ability to limit visibility of different feeds, and to filter streams by type (stories, videos, etc).
• Plaxo Pulse (www.pulse.plaxo.com):www.pulse.plaxo.com Lets users choose which of their groups will receive specific updates, filter stream by type and sync status updates with Twitter.
• Posterous (www.posterous.com):www.posterous.com Users post all content via e-mail or a customized form, then choose which services each post will be sent to (Twitter, Flickr, YouTube, etc.).