The FBI is focusing on at least eight different suspected bribery schemes as part of its corruption probe of Rep. William J. Jefferson (D-La.), according to a federal affidavit and sources familiar with the investigation. A key part of the FBI probe has centered around Jefferson's dealings with a Louisville high-tech company, iGate Inc., that was marketing broadband technology for the Internet and cable television in Africa. But an affidavit used in last weekend's controversial search of Jefferson's Capitol Hill office stated that authorities are looking at "at least seven other" bribery schemes in which Jefferson "sought things of value...