I'd also suggest doing searches on sites like this and www.wahm.com
for information about the different companies available. You'll find information about companies, but look around before deciding, because you can also find the good, bad and ugly about different opportunities.
And, remember, if it sounds too good to be true, it probably is. These guys that promote "no work, no selling, no inventory, no nothing" ... I feel better knowing that I have a product I enjoy sharing with my friends and acquaintances.