It works as follows:
If you enter a posting time in the past then the post happens instantly, with links up until that point in time.
If you put in a point in time in the future then the posting will happen then, rather than immediately. Which means I could set up today's post last night, and have it pop out automatically at midday today.
The next step is to include a posting frequency, so that people can choose to make a post every n days/weeks. Shouldn't be that hard :->
Original post on Dreamwidth - there are comments there.