Staffing agency Robert Half released some online calculators that give typical salary ranges based on location. Type in the job title in fields such as administration, technology, legal, creative, marketing and finance, and it will tell you the general going rates.
Accounting, finance: www.roberthalffinance.com/salarycalculator
Information technology: www.roberthalftechnology.com/salarycalculator
Creative and marketing: www.creativegroup.com/salarycalculator