For those that need their memory jogged, The Not-So-Friendly Skies daily is the one where you have to go around and kill Dragonmaw Transporters. It was, for me, one of the most annoying quests to do in the whole chain. The spawn points always seemed camped, and the previous drop rate was about 50%, give or take.
In A Slow Death, you have to poison 12 Dragonmaw Peon Camps. The Fel Glands dropped from any tainted wildlife in Shadowmoon Valley at a previous drop rate of about 25%.
Hopefully this will do two things. First, it'll help everyone working their way towards the 100 mount achievement, Mountain-O-Mounts. And secondly, it should help people get their alts a Nether Drake all the faster.