Libon Address Book for Android helps you communicate more intelligently.
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Create one amazing address book that incorporates your Twitter, Facebook, Gmail and mobile contacts – and even shows their tweets and status updates.
Use your mobile to share different things with different groups of people.Drag and drop your contacts into groups, such as of friends, family and colleagues, and choose what you share with each one – your avatar, your updates, your availability, even your location.
See your whole conversation history with each person, whether you’re in touch by call, Facebook, Twitter, text or voicemail.
Back it all up automatically, so you won’t lose touch even if you lose your phone – unless you want to.
Reviews

Making a connection
by the guardian.co.uk 28 August 2010
As that point approaches, we'll need even better apps to organise ourselves in social media. But they may be arriving already. Leggett points to On, a social media aggregation system for mobile phones, as another example of something that's on Android already, before other mobile platforms. Owned by Orange, but open to anyone on...
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Or simply search Libon - Address Book in the Android market place of your mobile.