A while back, Blizzard told players who were working on Insane in the Membrane to make sure to finish it soon, as several reputations were going to be removed in Cataclysm, making the Feat of Strength (and it's title) no longer available. Well, they've recently reversed their stance on that. Full details here, but the gist of it is that they're removing the Shen'dralar reputation as a requirement (because that rep will no longer exist); they're also allowing you to grind to exalted with the Bloodsail Buccaneers on Booty Bay Bruisers. If you're holding any of those Dire Maul librams or pristine black diamonds, sell now before everyone realizes they're worthless! This change will go live with the Shattering, patch 4.0.3a.
In unrelated news, Blizzard has stated that you WILL be able to race/faction change into Goblins and Worgen on Day 1 of Cataclysms launch; because of this, there will only be Realm First achievements for classes, not races. If you want to race change from a goblin/worgen into something else, you have to complete the starting area first (Kezan and Gilneas, respectively).