I tried this on my dev installation of wp 3.1 and it completely flips out.
If if make 5 posts with no delay inbetween it only puts 2 up for schedule and publish the rest of 3. Isn't it suppose to only publish the first one then start the timer to publish the next 4 with a 5 minute interval?
It's not working.
Also it slows down my publishing a lot, and sometimes give me timeout for unknown reason.
Hope you can update the version for 3.1 cause it would be a very useful plugin.