I've done several surveys where I was sent household products (i.e. all purpose cleaner, laundry soap). Two week supply, then just do a 10-15 minute survey at the end of two weeks. Can't say enough good things about this company.
If you do get to do samples, be sure you keep all the paperwork and instructions. They may contain a reference number needed for the survey.
A fun item they do is take ideas for quick polls on their homepage from users. The user is awarded points towards the payout.
1) Check out Viewpoint.
2) Check out our first Epinion on Confessions of a Shopaholic
3) Check out our Ecrater store - Diego, Jonas Brothers, Foofa, and more
Disney Magic: Business Strategy You Can Use at Work and at Home