Posted below on 25/4/07 as a claim based on indirect evidence.
Reported here on 26/4/07. via Josh Marshall (of course).
Now I have to read the McClatchy story by Marisa Taylor & Margarent Talev.
Update: The leak to Taylor and Talev is from "two senior congressional aides [who] spoke only on the condition of anonymity because the document in question hasn't been made public and because the Justice Department has allowed investigators to read it but not to photocopy it." They refer to an "early" version of the list without a specific date. Thus I don't have postive proof that Heffelfinger's name was still on the list in January 2006 and is one of the 3 redacted names on the version sent to congress.
Congressional investigators probing the firings of eight U.S. attorneys saw Thomas Heffelfinger's name on a version of the list that Attorney General Alberto Gonzales' former chief of staff, Kyle Sampson, began assembling in early 2005. Heffelfinger left in February 2006, more than nine months before the Justice Department agreed on a final list of prosecutors to remove.