Yahoo has an article on the growing number of online job sites catering to the over 50 crowd. They list 7 different jobs sites targeted at aging boomers and retirees. Interesting quote on boomers needing to work past the traditional retirement age:
"A survey of 400 employers by the center found that a quarter of workers in their 50s will be financially unprepared for retirement and will want to stay on the job at least two years past the traditional retirement age."
The survey was done by Boston College's Center for Retirement Research which has lots of good information and data on retirement.