"The technique is impressive and useful, but not all it may seem. First, it recovers the encryption keys from a physical memory dump file which must be generated separately with other software (for instance ManTech Physical Memory Dump Utility) requiring administrator access to the system."
That said, I would be surprised if Bitlocker didn't come with NSA approved "password recovery" mechanisms.
All this shows is that its not safe to leave your computer running if you have full disk encryption. Its no different than logging into, say, Facebook at a public computer and walking away. If you're already in, it isn't that difficult to steal/change the password.
BitLocker is nothing more than another annoyance to deter lazy thieves now :\
Microsoft is selling Windows 7 Ultimate to people who are computer illiterate with the sales pitch that it will secure their data. These people would never hear about TrueCrypt. They only hear about computer solutions with hundred-million-dollar marketing campaigns.
Some of my customers are the totally computer illiterate types who only use Microsoft products. I had been selling these people Ultimate as a way to encrypt their shit. Now I can't really recommend it as protecting against industrial espionage. And they'll never use TrueCrypt, it's too user unfriendly.