25 Apr 2011 at 19:59 - 7
Of course, the answer is no, but technically it IS possible, for a short amount of time. Data you delete on your computer doesn't go away, it becomes free space to be overwritten, but sometimes it might take a while before data is filled there so it can hang out for quite some time. The same is probably true about MMO databases, only, they have so many people that the data probably doesn't stay for too long before it is overwritten.
I believe other companies offer a restoration option in EXTREME circumstances, but they do not guarantee that the character will be the "same" when it's restored and they also mention that the window to restore is very, very small.