Submit sitemap for existing sites after installing Simple Sitemap plugin


I have a wpmu/bp site with 10,000 blogs that I've recently upgraded with 40 WPMUDev plugins including Simple Sitemaps.

I've submitted my home url. This worked great - 9 url's submitted.

I'm wondering if there is a way to submit the other 9,991 (or so) without waiting for someone to create a new post of without resubmitting them one at a time?