Plugin idea: Reorder posts

I’m writing a lot of posts that will be published in the future. However, the posts will not be published in the order I write them. Thus, I need to manually go and change the date for each post.

I would like to see a plugin that with an easy interface lets me reorder my posts. After they have been reordered the plugin would either:

A. Change the dates of all the reordered posts so that the first would have a set date and the following dates according to a set interval.

or

B. Change the dates of all the reordered posts so that the interval is even between all of them with a set start and end date.