Theses are MLM's, but they are legitimate MLM's, nothing shady.
Process claims for Doctors.
Bird Dog for Real Estate Investors.
Transcribe for Doctors.
Run an EBay Store.
Sell on Ebay.
A few months ago I read an article in some major newspaper (NYT?) re a company that trains people to audit medical bills for errors. They certify their trainees, and set them up to start a franchise-type business which makes its money by getting a cut of the incorrect excess charges found. Seems most medical bills are loaded with invalid charges. I believe insurance companies are the primary clients for this business. Google around and I'm sure you can find it.
I became a Southern Living at Home consultant in July to help pay for our exhorbitant property taxes. I am really enjoying the experience and the people are great. If you are looking into a direct sales organization I suggest several things. 1) Make sure that they are selling a product instead of just selling recruiting. 2) Make sure your start-up costs are low (under $200 or so). 3) Stick with a company that doesn't require you to keep inventory. Otherwise you are spending more than what you take in.
There are plenty of legitimate direct sales companies out there and you really can make good money at it if you work your business. Don't forget you get great tax-deduction benefits with a direct sales business in addition to the extra income!