Rumoured Plugin/Widget

I’ve heard rumours of a plugin or Widget, that can supposedly be used to automatically & sequentially post a series of articles/ posts to one’s WP blog at preset times.

In other words: Let’s say I’m tired of logging into my blog every day to post my daily content, I could preparea number (say 20 or 50) pre-written posts/ articles. Load them up to this plugin/widget, tell it how often to post (& where etc) and then walk away, knowing that for the next X days, I can focous on SEO/ PPC etc etc

Does anyone know of such a beast? If not, is there someone willing/able to write it, so we can market it?