Airdrop info to help newbies:

You must have your PPT off of exchanges and into your wallet for the blockchain snapshot to "see" your PPT when they take their snapshot for the free airdrop.

I know that EtherDelta is actually linked to a real ETH address etc etc but that's another story, so for the sake of keeping it easy, just take them safely back into your own wallet (for security sake too) and to definitely not miss the airdrop.

They haven't released the date yet but will right before.

It doesn't matter if you moved the tokens around to other addresses etc... it is all based on the snapshot of the whole blockchain they take at any given moment in time. This snapshot will show every PPT out there and the airdrop will be sent to wherever your PPT is at any address the snapshot saw your PPT at. So don't worry - it doesn't have to be at the address you bought the PPT from originally.

It's my understanding that anyone holding any PPT at the time of snapshot will get the free airdrop but don't quote me on that - I may be wrong but I think that is how I read it. In other words, if you missed the pre-ICO but bought some on an exchange then as long as the snapshot is taken sometime after that then you should get the free airdrop.... but again, that's just my understanding of it, correct me if I am wrong.

You don't have to "do" anything to get the airdrop except hold the PPT in your wallet. When the airdrop happens then the Populous team will announce it and how to "see" them in your wallet (ie: add the token). Easy!