If we may fantasize about where ancient Indus archaeology could go online, one need not look farther than the City of Ur project, a database of objects, excavations and research in this Mesopotamian city contemporaneous with the ancient Indus civilization. The New York Times describes it as a "digital reunion for the antiques originally brought together by the excavation team led by the British archaeologists Leonard and Katharine Woolley" in the 1920s and 1930s, when the major Indus cities of Harappa and Mohenjo-daro were also excavated. More at http://www.ur-online.org/
Or there is the amazing Cuneiform Digital Library Initiative at http://cdli.ucla.edu/ which "has posted images and searchable transcripts for more than 100,000 clay tablets, stone cylinders used to imprint personal seals and other objects inscribed with writing." (NYT) Not only would such a resource for Indus seals and inscriptions be incredible, the CDLI records also show the extent to which inscriptions at the time were records of economic and personal activity, bureaucratic tools much like Indus sealings must have been as well.
What kind of online digital tools would you like to see for ancient Indus studies?