Now with patch 3.3.3 Engineering Pets are not exclusively for Engineers! Great for the avid pet collector and even better for Engineers who want to make gold. On my server, the following pets commonly sell for 200g +

A crafting tip for Engineers to make gold off of Ultrasafe Bullet Machine and Saronite Arrow Maker.

A response to an email on which profession to pick and what professions would be good for a level 60 DK Bank Alt

Engineering Leveling Guide 1-450

Gold making ideas for Engineering in World of Warcraft WotLK.