Some kind of talent calculator would be nice. Most of the other sites have them, and it's a really handy tool considering you can respec, it lets you kick the tires so to speak.
If you guys could make some kind of UI a la Cosmos, I think you'd get more information as well. I try to remember WoWreader, but having it tied into starting up the game makes things much easier.
On the crafted items front, a column for what skill level you can learn the skill to craft them item would be great. Stats for the items on the same page would be nice so I don't have to follow the link (a la the FF:XI crafting listings) or a mouseover that pops up stats like the character viewer would be great.
Being able to sort everything by level or by side, etc would make cruising the information easier as well.
If an item is buyable by a vendor, a listing of which ones have the item and how much could be handy.
I'll be quiet now.
EDIT -- Would adding a "set" search to the item searches be doable? Like I want the results to return items that are only a part of a set?
Edited, Wed Jan 5 13:18:22 2005 by Almohada