For the benefit of anyone searching for fax numbers in order to communicate with Equifax, Experian or TransUnion, these are currently working as of 12/18/2011:

Equifax Fax Number: 888-826-0573

Experian Fax Number: 972-390-3838

TransUnion Fax Number: 610-546-4771

Please let us know if any of these numbers fail to work, and we'll continue to keep this thread updated as often as possible with the correct information.