|Evaluation criteria and methods for ICTD research are still evolving. Admittedly defining these will be hard and will take time.
Kentaro Toyama (MSR) takes a first stab at describing what a "good" ICTD research paper should be like. The document is available from his website, here. This is an evolving document, so feel free to give your feedback.
On a side note, Kentaro and MSR India were recently featured in the NY Times. The article gives a good overview of ICTD research at MSR India. Read the complete article here.