I highly doubt there are any shorts here. There's not enough dollar volume to be worth their while. As far as being on reg sho list, all it takes is 10000 shares. What brokerage house out there is going to lose sleep over $100 worth of stock on the books when they have billions of dollars of stocks? One primary reason many pennies are on reg sho is exactly that: it's not worth the hassle to do the paper work for the small amount of money involved.
Now don't get me wrong. I may not believe shorts are here, but it is quite possible we have some who want to accumulate at these levels, and it may get ugly if tax loss selling kicks in, which it doesn't always do, but can. One of the reasons some of these depressed stocks don't have tax loss selling is because those in them don't have any gains elsewhere that need ofsetting... We need oil.