Additionally the CGOAB journals read like a book whereas a blog is reverse chronology presentation.
I think a good distinction
to make between CGOAB and blogging templates like Blogger, Wordpress, etc. is Crazy Guy is a site for travel journals.
which isn't always the same as a "blog". (At least in my head.) CGOAB is a community of travel journals all about bicycle touring. So if all you want to do is talk about bicycle tours, it's probably the best place to go.
However, if you wanted to talk about bicycle tours and other stuff that may or may not be related to bicycling, a personal blog on a blogging template like Wordpress, Blogger, etc would be the way to go. These sites have the the added benefits of customization of design and all that, something CGOAB doesn't provide.
As for "reading like a journal", there are ways to create linear-reading journals with Wordpress, Blogger, etc, usually by creating "categories". A good example of using Wordpress to do that is here, check out trip reports on the right of the page:http://www.spiralcage.com/rootless/