WOW the results are in already - Shutterstock has been fast since last week - my pics are getting reviewed in half a day's time!
Okay - so this is what I did. I took 25 of my pics that were rejected, and resubmitted them. I honestly barely touched them, I maybe edited a few a little bit more from things that I noticed technically-speaking. Out of those 25, 16 got rejected, and 9 were accepted. 9 photos!! Ones that were rejected, were later accepted (probably by a different reviewer)...
All I did was renamed the files, in case the system stores filenames. These reviewers look at thousands a day, how are they going to remember what they rejected, even if you get the same photo reviewer? If you want to see what got in that was rejected before, view my portfolio and sort by newest - they are the newest 9 images. Nothing spectacular, but hey someone might need them. :P
http://www.shutterstock.com/gallery-...html?rid=59783
I am going to have to dig through my old rejections and see if there's anything else I can resubmit

I would also definitely recommend doing the resubmissions in smaller batches, separating similar shots the same "series".
It usually takes me a solid hour AT LEAST to keyword 10-20 images. This took a little bit of time trying to find them, and figure out which ones were the rejects, since a lot of the thumbnails on shutterstock were too old to still be there. But still - these older rejected images that shouldn't have really been rejected are usually good-to-go: they are all keyworded, edited and ready for upload. It doesn't hurt to try I guess.
Let me know how you guys make out, if you dare to try this :twisted: Just be careful, I am not responsible if they nab you for it... :roll: