Now what?

So a few minutes ago, a level 18 warrior whispers me and asks for 10g. Being a generous troll, I stole BRK's trick and said I'd give him 40g if he farmed me 99 Light Feathers.

"Great," he says, "I have over 100." And I get a group invite.

So I gave him his 40g, and now I have 100 Light Feathers and no idea what to do with them.

EDIT: Also, I was meant to be flying to Dalaran from K3 while writing this post, but forgot to actually do it, so now I have nothing to do for 30 seconds and that is way longer than my attention span.