This document proposes that government transparency of public data should be considered a new flagship goal for eGovernment policy in the era of web 2.0, replacing the previous focus on making government services available online. It argues that transparency of data can drive innovation, expose inefficiencies, and increase accountability in a way that is important for web 2.0 applications and citizen engagement. However, transparency alone may not catalyze large-scale IT investments in government in the same way as previous eGovernment policies. The document puts forward a proposed new methodology for benchmarking transparency by assessing the availability and reusability of 20 key public datasets.