As I've been going through these (and other) forums I've found the term "bricked" used several times. If I interpret it correctly it means an irreversible state from where there's no return.

So what I don't get is how is it possible to "brick" the N900 if one can reflash it with factory ROM any time. Can a permanent damage be done to the internals of the N900 with running some code?

Any help clearing up my confusion is greatly appreciated.