I've read it, interesting that Bitfinex didn't announce anything about the CFTC, not that they would.
...
They might not be allowed to do so if it was a secret subpoena.
Wikipedia:
Secret subpoenas, such as those covered under 18 U.S.C. §2709(c) of the USA
Patriot Act, provide criminal penalties for disclosing the existence of the warrant to
any third party, including the service provider's users.
A Bitfinex employee actually made use of a warrant canary in December.
If you are interested in the details you could read this post I made in the Wall Observer
Thread earlier today:
https://bitcointalk.org/index.php?topic=178336.msg29264569#msg29264569