GetFriday are an outsourcing company starting from $15/hour on a pay-as-you go model. Drops down to $10/hr for 20hrs/mth or as low as $7/hr for 160hrs/mth. Time and a half at the weekends.
Quadrant India are an Indian outsourcing company. They offer a range of clerical / administrative services. No prices listed, probably larger jobs. They have 350 staff.