Paragon (Lightning's Blade - EU) did world first A Tribute to Mad Skill achievement a few minutes ago.
http://www.paragon-wow.com
Click for full size pictures.
Damage meters:
Official killshot:
On a side note, tanking this encounter is totally screwed. We benched our Ulduar 25-man geared Death Knight maintank and picked up an Ulduar 10-man geared alt Warrior to make the kill possible.