How do you define what a “blog” is? Back in the day, a blog was a weblog—an online journal. This definition had connotations of timeliness, of narrative, and of a personal focus.
But these days, blogging has expanded. Bloggers may be hobbyists or corporate CEOs. Blogs may be personal or professional. Even the tools that bloggers consider decidedly blog-focused, like WordPress, are used increasingly on news and other content sites.
So what is a blog? Where are the boundaries around blogging? Do they even exist any more?
via problogger.net
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Bright, shiny objects! 
What do you think?