So far, 4 rares (Gnome and Raptor pet, Arrival of the Naaru and First Shaman headdress) and currently at 385.

12 rares for me so far, only 1 is actually useful, I got a 359 ring "Ring of the Boy Emporer."
I would have much rather had the recipe for the vial of the sands instead.

I would trade all the rares I got so far including the raptor mount for that stupid recipe.

15 rares so far - sad that there's no BoA gear that's at all useful for a feral druid! Although I guess it has helped my character's iLvL out...

Have something like 600 fossil fragments sitting in my book. Completed 100% Night Elf, Vyrkul, Fossil so far.