An short update has been published by the BEA
http://www.bea-fr.org/francais/actua...m20071120.html
Rough translation:
The aircraft was stopped; wheels were not choked. A last engine test, with brakes, was ongoing. The first CVR/FDR data show that the four engines were at high power since approx 3 minutes. The aircraft started to move and hit a blast deflector thirteen seconds later [...].