I plugged it in and played Mass Effect for about 4 hours, and it crashed and started RROD'ing again!! Unbelievable. Its been returned now for the second repair job in less than a month....
That sucks.
I hope they are going to do a quick job for you.
Too be fair, because your repaired one is still knackered, they should've just done an advance replacement and collected your one at the same time.
I don't think they do this but there is no excuse not to as they must have buffer stock at the repair centre.
I'm waiting for mine to come back and I've read that quite a few people have had a replacement DVDROM when the box has suffered from 3RLOD (yeah nice one repair dept, lets employ people who are clueless).
I've also read about a few people who have suffered the same scenario as you have.
God help them if mine dies again so quickly, I won't allow them 2 - 3 weeks yet again to sort it out without daily calls from me chasing the replacement / repair.