You can 'Send contracts to the net' by using the button on the top menu tool bar [1] above the Sandbox panel. Doing so will bring a pop-up [2]
Note the message Account 0x..d3 has zero wei and the JSON RPC URL [3] is set to https:frontier-lb.ether.camp. That's because you need to pay for the transaction gas needed with real ether. For testing purposes replace the JSON RPC URL with the morden testnet URL morden-lb.ether.camp
Now in a web browser go to morden.ether.camp and click the 'Get Address button on the toolbar then 'Get Free Ether'
Then back to the Studio, fill in the values and send transaction.
After a while transcation is mined. You can visit morden.ether.camp to see the transaction on the morden blockchain.