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Well, there is always "hope" but so far nobody did. Susan Collins bought some time (just like Olympia Snowe bought some time and delayed ObamaCare for about a couple of months while Senate Dems were trying to make bill "bipartisan," until Scott Brown's shock in MA)

SEC Split on Party Lines Over Goldman Case (But Obama denies any involvement) - FR / WSj / NYP, #15

So, Reid will do a bluff hoping to intimidate some Republicans coinciding with Obama's pitch for the bill in his travelling salesman routine:
Reid to play chicken on Wall Street reform, daring GOP to filibuster - The Hill, 2010 April 20, by Alexander Bolton

Senate Majority Leader Harry Reid (D-Nev.) has decided to play a game of political chicken with Senate Republicans, daring them to kill a Wall Street reform bill.
Reid said he plans to move ahead with immediate consideration of the financial regulatory reform bill, despite a GOP pledge to filibuster the measure.
“Remember, there are only 59 of us, so if a single Republican is not willing to join with us, there will be no Wall Street reform,” Reid said. “Republicans will have killed Wall Street reform. I am confident that will not happen.”
Sen. Susan Collins (R-Maine), a crucial swing vote, said Monday that she would support a Republican filibuster if Reid tried to advance a bill crafted by Senate Banking Committee Chairman Chris Dodd (D-Conn.).
But Democrats believe that even if Collins votes to block a bill, other centrist Republicans, such as Maine Sen. Olympia Snowe, may vote to allow debate. .....

The more time GOP can milk by extending "hope" to Dems for "bypartisan" bill, the less time Dems will have for other pernicious bills before November.