On our server there's only one person with it and he is a massive jackass. All he does is spam trade chat. He's on a final warning because of it too. Already got 2x 1 week bans.
Guildies from my shaman's regular 10 man asked if I would go on a mount run. I thought, that thing never drops anyway, but eh what the hell... I will go.
You should go for the 100mount achievment, I tried, I got up to like 26 mounts(at lv 72) .__. Wintersabers took forever since I did it at lv 60, might want to get it quick, they might change it in cata, considering your able to fly and sht.
p.s. Back in ner'zhul there were these group of people that would afk at dalaran flying area. All of them rogue's with "the insane" title, with the crystal tiger mount(forgot name) and/or Phoenix mount. I lost my screenshots, can't find them ): But I remmember there were atleast 6 of them. And there was always this ONE guy who would afk with his onyxia mount by the bank well.