Case study from MSH entitled "Applying or Integrating Mobile-based Episurveyor Technology into Malawi Malaria Supervision", in which they describe using EpiSurveyor for field data collection and analysis in Malawi.  Our favorite excerpt:

"Overall, the use of EpiSurveyor Mobile in Malawi proved to be successful, particularly in the data collection, data analysis and data entry phase. Therefore, the team recommends using the EpiSurveyor Mobile for all future data collection of the malaria supervision activity in Malawi . . . Very limited support was provided by DataDyne staff to the Malawi pilot. The basic (free) service of EpiSurveyor did reduce the overall cost of the pilot. Therefore, the EpiSurveyor delivery model can also prove to be scalable because it does not require ongoing technical support..."

http://www.datadyne.org/files/EpiSurveyor_Malawi_malaria__sps.pdf