Once Daedalus wallet is lauched you will be able to see a new feature called Redeem Incentivized Testnet rewards which will allow you to to claim the rewards for the ITN and transfer them to the Cardano mainnet.
Looks like there is no "Redeem Incentivized Testnet" feature in the Daedalus wallet, I just downloaded/upgraded. Is yet to be released? or is something I miss, as I can't find the feature.