NO there isn't. The only coin that I know of that is implementing that is DASH and last I checked its still a highly debated topic.
Keep in mind that POT is on its 2nd set of devs, IIRC. I am not sure how long potlabs has been in the picture but I am sure they mined a large chunk of the POW phase, they had the ability and the muscle to throw around to fix the POW fork a couple of months ago.

If potlabs was for it, I would be open to something like Reddcoin is implementing in their restructure. Setup a multisig wallet 3:5 or something with a couple of the keys in the hands of devs and the rest in trusted community members, not sure how that would work to let the coins stake, but its a possibility if/when funds are ever needed to be raised for sustainability. I do believe the way it should work though is if they are successful and the coin gains market share and capitalization as the value of the coins they hold grow the further they can go to keep growing the user base.