Since Ethereum blockchain is up and running 3 Dapps who have catched my eyes but unfortunately it is very difficult to find more information about their progress (appart from here: http://dapps.ethercasts.com)
Croesus: Decentralized advertising platform build on ethereum @tym4t
EtherEx: Decentralized Exchange
EtherPoker: P2P Poker powered by Ethereum
Any news or update on those?