Of coming Dapps I'm waiting for development of Gnosis http://gnosis.pm/ . They are going to start crowdsale in Aug - Sept. Augur is already working on testnet, but Gnosis is getting more support from EF it seems to me. Regretfully almost all releases were delayed after TheDAO mess.
DEVCON-2 will show many interesting things.
As for ETC, if you hold ETH, you should get the same sum in ETC now. I dumped my ETC on the first Poloniex day, have lost a bit, of course... I really don't see any use for ETC but speculations. As to that DAO story there's great post of avsa (Mist author) on Medium https://medium.com/@avsa/the-truth-about-the-fork-fd040c7ca955#.fasfrira7