AARP has released a list of the Best Employers for Workers over 50. According to the press release many of these organizations are offering very flexible work arrangements, which presumably results in better recruitment and retention.
My guess is that many of these factors would be attractive to a variety of ages, not just those over 50. However, this IS a good example of how organizations can use things other than money to entice and keep good employees. A couple other good examples can be found in Business Week's August 21st issue, here and here which give examples of GE and Patagonia, respectively, and how they use growth potential and a strong vision to their advantage.