Since this thread resurfaced I saw that we were waiting to see if anything related to this incident made it to the volunteer aviation safety reporting system. I ran a query and one report did appear: The controller's side of the incident, which is interesting given that the pilot was the one who failed to follow instructions.
Here is the full report (note the controller's narrative toward the bottom of the report):
ACN: 750426 (1 of 1)
Time / Day
Local Time Of Day : 1801 To 2400
Date : 200707
Place
Locale Reference.Airport : PHL.Airport
State Reference : PA
Altitude.AGL.Single Value : 0
Environment
Flight Conditions : IMC
Light : Night
Aircraft : 1
Controlling Facilities.Tower : PHL.Tower
Operator.Common Carrier : Air Carrier
Make Model Name : B757-200
Operating Under FAR Part : Part 121
Flight Phase.Ground : Taxi
Flight Plan : IFR
Aircraft : 2
Controlling Facilities.Tower : PHL.Tower
Operator.Common Carrier : Air Carrier
Make Model Name : Regional Jet 200 ER&LR
Operating Under FAR Part : Part 121
Flight Phase.Ground : Takeoff Roll
Flight Plan : IFR
Person : 1
Affiliation.Government : FAA
Function.Controller : Local
Qualification.Controller : Radar
Experience.Controller.Limited Radar : 10
Experience.Controller.Radar : 2
Experience.Controller.Time Certified In Position1 : 2
Experience.Controller.Time Certified In Position2 : 2
ASRS Report : 750426
Events
Anomaly.Conflict : Ground Critical
Anomaly.Non Adherence : Published Procedure
Anomaly.Incursion : Runway
Independent Detector.Other.ControllerA
Resolutory Action.Controller : Issued New Clearance
Consequence.FAA : Investigated
Miss Distance.Horizontal : 700
Assessments
Problem Areas : Flight Crew Human Performance
Primary Problem : Flight Crew Human Performance
Air Traffic Incident : Pilot Deviation
Narrative
WHILE WORKING LCL E ON A RWY 9 OP, I NOTICED A B757 APCH RWY 9L AT TXWY N. THE LCL W CTLR WAS ISSUING TAXIING INSTRUCTIONS TO THAT ACFT TO TURN AWAY FROM RWY 9L AND GO S, NOT N ON TXWY N. IT APPEARED THAT THE ACFT WAS NOT FOLLOWING INSTRUCTIONS. I HAD ALREADY ISSUED TKOF CLRNC TO A CRJ2 ON RWY 9L. I IMMEDIATELY CANCELED HIS TKOF CLRNC AND ADVISED HIM TO EXIT THE RWY AT TXWY T. A FEW MOMENTS LATER THE B757 ACFT CROSSED THE RWY. THE AMASS ALERTED BECAUSE THE CRJ2 WAS STILL SLOWING DOWN TO EXIT AT TXWY T. AFTER A REVIEW OF THE VOICE RECORDINGS, THE B757 PLT CROSSED THE RWY WITHOUT ATC AUTH.
Synopsis
PHL LCL CTLR DESCRIBED GND CONFLICT WHEN ACR ENTERED RWY WITHOUT CLRNC, REQUIRING TKOF CLRNC CANCELLATION AND INITIATING AMASS ALERT.