For those who are retired and need some extra money to make up for the low interest rates, this AARP article may be useful: Great Work-at-Home Jobs for Retirees
It's one of the better work-at-home articles that I've seen. Some interesting opportunities that I wasn't aware of include online juror and virtual assistant.
As mentioned in the article, there are many work-at-home scams on the web. Red flags to keep in mind are 1) if they want payment, 2) if they ask for financial information, and 3) if they promise a high pay.