The 'block' is long gone.
"Senate GOP Will Lift Block on Subpoena Power Against BP." Washington Post, July 1, 2010, The Plum Line, Greg Sargent.

Senator Jim DeMint put a block on the legislation during a voice vote. Later his spokesman said, "Senator DeMint does not and will not have an objection to this legislation. He simply objected on behalf of other senators who had not been given time to review the bill."
The colums says that the leadership has read the bill and decided it has no objections, it will move forward if a Dem asks again for it to be passed by unaminous consent.
A spokesman for Mitch McConnell, confirms that the leadership has no objections to the bill. "I don't know of any objections," he said. "What I do know is that there is bipartisan support."