After 2.3 comes out, this crate will have a chance to drop:

Weather-Beaten Journal
Binds when picked up
Requires Fishing (100)
Use: Teaches you the fine art of fish finding.

This teaches you the ability to "track" fishing pools, and it works just like the other tracking abilities (puts yellow dots on your minimap).

thottbot doesn't have this item yet but check out wowhead:
http://wowhead.com/?item=34109