I finally got a heroic Iron Qon kill last week, making 4 heroic kills in ToT.
The only heroic kill that Infamy has that I still don't is Tortos - the fight I was probably the most intimately familiar with, since we spent so much time wiping on it.
With Patch 5.4 imminent, I'm hoping Zero Yard Range will be able to get Tortos next week, but I don't have any high expectations.
Somewhat related, I have high hopes for flex raiding in 5.4 - 3 of my former Southern Wardens guildies have come back to WoW and started gearing up in preparation for joining Infamy's planned run. Would be great to have 5 Wardens and Infamy in the one run - ZYR is good, but just not the same as having the old crew back together!