"Work At Home" Opportunities?

I know that a lot of people want the security of finding a company that will let them work from home.  I have yet to find such a company.  One of the forums that I belong to has suggested finding others who work from their own home for a company and talking to them to find out how legitimate it is.  There are those that telecommute meaning they do some of their work at home but they also spend time at the "office" as well.  They have usually worked for the company for some time and have built up an honest reputation and are allowed to do some of their work from home.

But as for companies that offer legitimate work from home opportunities I have not found any!