Change default publish time and date to ‘last recent post 1 hour’

I’m looking for a plugin that will change the default publish time and date on the ‘new post’ screen to “x minutes” from the most recently published post, so I can go schedule a few dozen posts without having to keep track of when the most recnt post was.

Would be super dooper if this was able to affect drafts as well, so i could make a draft and when I hit ‘publish’ it would be auto scheduled.

I’m aware of http://www.andrewgrant.org/post-queue Post Queue, but that plugin requires editing the post date, and won’t look at drafts.

Anyone know of such a plugin? or willing to write it up?