(Each evolution of "blog" has contributed to changes in the variety and quantity of UGC. From traditional forum, message board, personal homepage to blog is the first change; blog to micro-blog is the second change. And will the appearance of light blogs mean the third change? How to define the user groups of blogs, microblogs and light blogs, and do their living spaces overlap? Where is the next shape of blog evolution?
Wudaokou Salon Issue 7: The Evolution of Blogs.doc)