Anyone know of a plugin to queue posts automatically?

Folks,

I know there is the ability to manually edit the timestamp on a post before publishing, but does anyone know of a plugin to adjust the timestamp automatically when the publish button is hit?

What I’m thinking of is a feature that would set the time of the post to X hours or days past the date of the latest post already in the blog (including those already in the future). The idea being to make it easy to build a queue of posts without having to do the mental arithmetic for each post.

It would also be nice to have an option to say that the post will carry a particular time of day – say all posts post at 12:00am, or whatever.

I’d do it myself except I don’t know diddly about PHP…