No, Judith Miller sat in jail until the prosecutor agreed that she would not have to testify about any source of the information about Valerie Plame other than Libby. Miller had multiple sources, and everyone already knew that she talked to Libby. The real question is, who was her other source? Some have speculated that it may have been Plame's husband, Joe Wilson, or maybe another journalist. Now, we may never know.
If she's allowed to report on some sources but not all; it will be a travesty of justice.