aacf4497__Blogger__Tumblr_and_Posterous__0
[Blogger.com] Suited for all sorts of blogs - both personal and professional. [Wordpress.com] Suited for Personal, Professional or Enterprise type blogs. [Tumblr] Mostly suited for Photo/Personal Blogs. [Posterous] Suited mostly for Personal Blogs. [0] 
Usage
Choosing a Free Blog Host - Comparing WordPress.com, Blogger, Tumblr and Posterous
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