After trying to jimmy open the Mirror's Edge demo's lock on time trials over the course of a few months and completely failing, we can put down the lock pick and rest our now crippled hands.
EA just announced that they've willingly unlocked the time trial mode in the Mirror's Edge demo. No unlock code necessary. We're not sure how much of a sales spike this demo restriction lift will have on the retail game (probably none), but are happy no matter. We get time trials and no longer have to rely on video footage to get the experience.