Does anyone know if there is a definitive list of bitcoin exchanges and wallets that are going to be distributing bitcoincash?

What distribution? It's already over even If you add bitcoins into exchanges right now, you won't be credited BCH and If you are looking for exchanges that accept deposits with low amount of confirmation then I suggest HitBTC, and for a full list check CoinMarketCap as BitcoinCash official site seem to be outdated.
you can still claim with your local wallet, any privatekey that go through the fork and was holding bitcoin before it, i'm sure not everyone claimed his/her bitcoin cash yet
You're right Amph and I'm among the people who haven't claim their bitcoin cash because I have not understand how the BCH and BCC system works very well and that's because I wanted to stick to only bitcoin not altcoin just created. To me bitcoin cash might be altcoin and what I wanted is the really bitcoin.
I will be glad if you could let me know if I'm leaving something behind or something.