Thread:Spike144/@comment-20644-20121015200222/@comment-4795804-20121027125526

While the Help:Blog article/Bloglist says
 * order
 * This specifies how the post are sorted.
 * Inputs are  or  . If unspecified, it defaults to date.
 * For example:

the the bloglist supports also sorting by the number of comments via or

We use it on Blog:Popular blog posts (Special:Export/Blog:Popular blog posts).