I have heard of that....how do I find out about it in my area

? Im in!!!!!
I work full-time but supplement my income with mystery shopping. Some of it is straight shop fees and some of it is reimbursements. I've been doing it for a little over 2 years and I make around $125/month. It's not a lot but I only do 2-3 shops a week during my lunch hour.
Here's a copy/paste (too lazy to retype it!

) I put in another thread for someone looking for a way to make extra money:
Two very reputable companies are Marketforce and Bestmark. The vast majority of shops I do are for Marketforce and their affiliate, Certified Field Associates. It's the kind of thing that's perfect for a college student as you look and see what they've got in your area and you pick and choose the assignments that appeal to you and fit into your schedule.
Lots of fast food shops where they'll give you $7.50 plus reimbursement for food (not so good on the waistline so I have to make sure I only "taste" the food without scarfing down the whole thing!), grocery shops where you'll get $10 reimbursement for items purchased, restocking stores with things like trading cards or calling cards that pay around $8 for a half hour of work. Little bits here and there where you actually have to go and do something, submit an online report and scan in any required receipts, and pay attention to detail. They pay either every 2 or 4 weeks for work completed previously.
Costs nothing to sign up with either of the companies I mentioned but you will need to provide your SS# as they are real companies and you're treated as an Independent Contractor. If you make over $600 in shop fees (not reimbursements, they don't count as income), you'll get a 1099 for your taxes.
Even if you don't have a specific reason to save money, it's worth looking into for a little extra spending cash.