I spent the first part of 2012 making the programs and algorithms, and have refined and tested them (with $35k of my own money) this year also. I'm eager to launch a new website service where people will be able to take advantage of my work later in the month--at least a beta version.
It only takes about 2 minutes to make a beautiful Excel sheet with my picks, and then another handful of minutes to make the investment. Couldn't imagine doing it any other way.
When the API comes online I will make a server service that continuously runs my algorithms and automatically invests any idle balances. Or perhaps I will work with others who have developed such systems already. There's some good stuff brewing!
If you get enough loans in which to invest with a strict filter strategy, that's great. It's hard to scale up a filter strategy to sell, though, so that there's enough "product" for all your subscribers.