Well i cannot see a thread on this topic and ive had a lot of memorable wipes that include:
Heroic Vaults: Boss enraged and wiped out all of the dps in 1 attack.
Heroic UP: Healer stood to close to the dragon boss guy and started the event, resulting in the slaughter of the other fury warrior and himself and then the rest of us as we tried to run.
Heroic Nexus: Tank gets one shotted by the dragonkin that used spells. Healer died. We all died.
thats it for now, most of my wipes have been stupid mistakes but theres bound to be more as i progress in wotlk.