aacf4497__Blogger__Tumblr_and_Posterous__0
[Blogger.com] Share buttons, Blog follow, Cross posting to Y!, Live, Facebook, Twitter and Linkedin [Wordpress.com] Share buttons, Blog follow, Post ratings [Tumblr] Blog follow, Reblog, Message blog owner, Post likes, Cross posting to Twitter/facebook [Posterous] Crossposting to multiple sites, Post likes, Blog follow [0] 
Social Features
Choosing a Free Blog Host - Comparing WordPress.com, Blogger, Tumblr and Posterous
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