What’s more important in a social messenger?

// February 20th, 2008 // Social Media

If you have a second, would be great if you could tell me which features are most important in your social messenger (bluepulse, twitter, pownce, jaiku, mig33, etc.) Go ahead and choose as many as you like, and please comment on the post if you’d like to say more about your choices or tell me what’s missing from the list. Thanks!
What’s more important feature in a social messenger?
All my friends are on there already
Works great on my mobile phone
Quick to update my status
Publishes RSS feed of my stuff
Good privacy and spam controls

  
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(This is part of Shai Coggin’s 52 Weeks of Blogging Community project.)