Terms of ether sale:
https://www.ethereum.org/pdfs/TermsAndConditionsOfTheEthereumGenesisSale.pdfclause 19.9
Risk that Ethereum Platform May Never be Completed or Released.
Purchaser understands, that while Ethereum Team will make reasonable efforts to complete the Ethereum
software, it is possible that an official completed version of the Ethereum Platform may not be released
and there may never be an operational Ethereum Platform.

This is poor form.
I see, raise money and put as many out clauses as possible, that will inspire confidence!
I'm sure they will deliver, but I never expected such legal manipulation from the Ethereum team.