I know Invincible isn't all the buzz that it used to be, but I really don't care. I've been wanting this for so long... I can't even tell you how much I freaked out. I've been running every week on multiple toons. Has amazing symmetry given that it dropped for my DK and that it happened after I had finally finished Blood Infusion on both my pally and my DK.
It seems as though in a few more weeks I'll have my Shadowmournes on my Pally and on my DK and I'll be able to stay out of ICC for good!
Best of luck to everyone who's been wanting to finally have this mount themselves.