BloggingStocks suggested that Obama's Treasury Secretary might be Jon Corzine. Corzine is the governor of New Jersey, and has a background in finance.
From Jon Corzine's bio:
As New Jersey's 54th governor, Jon S. Corzine has applied his experience as a Wall Street executive and as consensus builder in the United States Senate to advance an agenda of socially-conscience initiatives, while maintaining a focus on financial responsibility.
Governor Corzine began his Wall Street career in 1975, when he was recruited by the New York investment firm Goldman Sachs. After taking a job with the firm as a bond trader, he and his family settled in New Jersey. Corzine's financial acumen propelled him through the ranks at Goldman Sachs, where he was named a partner in 1980, became a key player in crucial strategic decisions, and was eventually named chairman and chief executive officer in 1994.Corzine assumed the helm of Goldman Sachs during a troubling time, as the firm had suffered massive losses resulting from a downturn in the bond market. Through strategic initiatives that included realistic expectations, risk diversification, and a methodical approach to the future, Corzine reversed the fortunes of the firm and restored its longtime status as the leader of the investment banking industry.