++ 1 on that.
If the Agenda is perceived as a planning/project management tool, this should be an useful feature for many. It is pretty standard, I think, to order and prioritize items in the context of planning.
For one, I miss this feature a lot. In particular, I’d very much like to easily prioritise and organize lists of bibliographical items (actually not tasks) in my research projects, dividing them in works to read, in progress and done. I had a wonderful system built with emacs org-mode during my PhD for that purpose. Since I moved from emacs to more “graphical” tools, I tried to do something similar with TaskPaper, but I’ve never been as pleased as before.
I have very high hopes with the Agenda in this respect because of the way I can integrate my projects and logs, but the tools offered (copy & paste) are really unsuitable for ordering list items (or paragraphs, for the matter).
I have considered creating a Keyboard Maestro macro for back-and-forth Markdown copy/pasting between the Agenda and Sublime Text, but it seems things might break very easily (reminders, for instance). Besides, it would feel very natural to do that inside the Agenda…