cheap programming labor
Say you need a bunch of smallish apps written. For the small cost of putting up a job listing on monster )or whatever jobsite of your choice) you get applicants who seem decent enough by resume. Then talk to them for 15-30 minutes and say that the next step of the hiring process is a 4-6 hour programming test. They'll be excited and work their butts off trying to make nicely polished code that meets your needs. Then you can let them down by saying that they found another candidate that fits your needs. But at the same time, you just got a bunch of code written. Hmm... probably only useful for a couple of goes before people wise up.