I haven't had my truck back to the local dealer since mid '08 and it was reflashed with I believe 'AX'... are there reflashes after that for the '07. 5's? And if so what do they change? I thought the last reflash back in '08 was supposed to have fixed the reoccurring soot sensor issues but the CEL light was back on again within a couple of hundred miles, #@$%! it eventually goes off after enough engine restarts. My 3 year warranty is up here shortly so need to get as much taken care of before that. Not sure that I can afford any of the extended warranty's. Found out they want more for the trucks with the 6. 7 engine because its considered a 'commercial' vehicle, that's what they told me anyone... sounds like BS to me. 
