I think this part is the most important
"Walter Pincus, Dana Priest, and other researchers have previously noted that Plame’s front company was called Brewster-Jennings & Associates, a disclosure that has generated remarkably little follow-up from a media usually eager to expose CIA scandals. Some researchers have asserted that Novak’s 2003 column compromised CIA assets linked to Brewster-Jennings."
I expect she was a low level noc that gathered information by phone or some such which was why Brewster-Jennings was not setup as a larger front company. All of the research in to Brewster-Jennings indicates that there was not much there other than a phone and a drop box. The only problem with exposing her and this front company is that if some other noc who was higher up in the covert ladder had Brewster-Jennings on there resume they are now exposed also. I don't buy in to the idea that the administration set out to destroy her or anyone else, mearly to discredit and in the process may have really screwed some other nocs...
In assessing the impact of the leak, CIA officials were concerned mostly about the people Wilson had recruited over the years and the informants she had worked with, even while workingon the Iraqi WMD issue. "We were more worried about her soruces," said [CIA Executive Director Buzzy] Krongard. There was also the possible exposure of Brewster-Jennings & Associates, the front company that the CIA had used to provide paper cover (as opposed to operational cover) to Wilson and other CIA employees for tax records, insurance purposes, and other paperwork matters. . .This firm, according to business records, had a Boston address, but there was no Brewster-Jennings office at this address.