Game Developer magazine have released the results of their patented "Game Developer Salary Survey", which gives us an insight into just how much the average games developer gets paid.
And the findings reveal that, provided a dev still has a job, most positions in the field pay quite handsomely. According to the survey, the average salaries are:
Game Designers: $67,379
Quality Assurance: $39,571
Business & Marketing: $102,143
Note that these are the average numbers, and vary according to factors such as experience.