Do you have any plans to make it possible to use an orb for blogging?
One very simple way to turn a wiki into a blog is to add shortcut for "todays page". The shortcut should open page "/blog/yyyy/mm/dd" for editing. It is a killer feature for me in Zim desktop wiki (http://zim-wiki.org/).
You will probably have to add some sort of pages-listing-child-pages, but it shouldn't be very hard. I know, because I have tried it myself for a wiki I have been developing ;-)