WoW Insider writes:
"Insider Trader is your inside line on making, selling, buying and using player-made products.
Wrath of the Lich King has added some wonderful crafting changes, from new abilities to better, more efficient systems.
Blizzard's intention is to move us away from feeling that we have no real choice when selecting a profession. 'I am a cloth-wearer, therefore I must take up tailoring' is a thing of the past.
Each profession has bulked up its profession-only benefits, as well as fun items and marketable goods, to the point that your choice can be more properly swayed by what you would like to do."