How to reset autoblog?

Hello,

Running 3.1.2 of WP multisite. I was testing autoblog and wanted to post an excerpt instead of the full post, so I deleted the posts where it had posted the full post. I went to process again but it will not post them again. In the debug i get "Notice: No new entries in feed".

It makes sense, I assume it keeps track that they have already been posted. How do I reset this? I dropped the autoblog tables in the wp_sitemeta / uninstalled / reinstalled etc.. but I still can't get it to 'refresh'

Any ideas?

thanks!