We started a (WP hosted on WPengine) blog for our startup at http://blog.octanenation.com/ and there are some behind-the-scenes posts that I would like to write that I don't think would fit well on the 'business' blog, similar to what Patio11 has done.

Where do you blog about these things? I'm not crazy about hosting/installing/maintaining a WP installation. Though I'm active on FB it's too closed and not the right 'vibe'.

What do you suggest? Tumblr? Blogspot? Wordpress.com? etc?

Thanks for all the suggestions!