TIME.com: Disgraced Congressman 'Wore a Wire' -- :

"Sources familiar with the situation say Cunningham, a California Republican who pleaded guilty Nov. 28 to taking $2.4 million in bribes ? including a yacht, a Rolls Royce and a 19th Century Louis-Philippe commode ? from a defense contractor, wore a wire at some point during the short interval between the moment he began cooperating with the feds and the announcement of his guilty plea on Nov. 28.

The identity of those with whom the San Diego congressman met while wearing the wire remains unclear, and is the source of furious ? and nervous ? speculation by congressional Republicans."

oh, and you gotta love this

"An FBI spokesman declined comment. Asked whether Cunningham...had worn a wire, the spokesman said the response from a higher-up was, "Like I'd tell you."