Everyone from the millionaire corporate chairman to the single mom with two jobs and three children under age 10.

Concierges are finding their services are needed more than ever, not just by Mr. Corporate, but by Josie Average, too. As mid-level workers get busier and busier, they're becoming more and more comfortable with the concept of passing along their errands to personal concierges. And in an effort to attract and retain employees, more and more companies are offering them personal concierge services.