@roger,
Don't laugh, I've heard of people having businesses doing this, and they make a living.
Here's one in Austin called Doody Calls.
http://www.scoopthepoopaustin.com/
They start at $10 per week for dogs. Cleaning cats litter boxes start at $14 per week for the first box, 50% off for the 2nd....they supply the litter
They also do community pet waste management.
edit: Thinking about it, I guess after you get over the initial eww of picking up poop it's not that horrible.
You have the proper tools so you don't have to bend over, face mask, gloves, proper disposal method and it's another job.