Yes it usually opens right in the middle of the month. This month has a Monday that's a 15th, I bet it will be that day.
That will be PUBNAT7.
I member who used to post here, VeniVidiBitchy, posted a few times saying that September would be the end of the off-the-street applications. I don't know if that's true or where she got that information, though. Maybe they were just planned through the end of fiscal year 08, and when fiscal year 09 starts in October there will be more. Who knows?