Got my hunter to Lvl 40. :) Need Spider's Silk, apparently everyone needs it and nobody can find it, so it's heinously expensive at the auction house. Looks like I get to go back to the low-level zones and beat up spiders for a few days. *sigh*
Also, heavy leather is apparently rare as well. Dammit WoW people - make these things a bit easier to find!
Tailoring is difficult without these items - esp at middle levels - I just hit 150 in tailoring, pretty much have to have Spider's Silk to use the regular silk found on everyone, and Heavy Leather to make silk bags to store things in. Ah well.