Ethereum foundation officially supported ETH blockchain
After 3 days of silence, Ethereum Foundation issued stetement in support of ETH. They also offer a splitting contract for users, interested in ETC to avoid replay attacks.
To verify that all assets are transferrred, you may use ETC block explorer .
But Dapps can only run on one blockchain.
Source: https://blog.ethereum.org/2016/07/26/onward_from_the_hard_fork/

It's telling that this needed to be spelled out. The ETC madness has to end.
Excellent pump! Just look at coinmarketcap - everything is red and ETC +250%. It seems, all brave guys are at Poloniex now!