I actually came up with a more simple idea.
I create niche sites, so I set them up once and pretty much forget about them. What if I use WPRobot to fill in some content. Usually I just put the picture, the price and the title, and maybe the features.. I stay away from the real content so I don't get hit with duplicate content penalty.
What if after I've set up 20-50 products set up to drip out over a few weeks, I just uninstall WPRobot, before google indexes the changes.. I'll have to see if deleting the plugin gets rid of the folder ect.