Technologies such as clouds and virtualization are attracting a lot of interest in grid and e-science worlds. With respect to grid systems, they are often seen as complementary or as natural extensions, but sometimes as competitors. In this session, a number of talks will report experience in using cloud technology and services, as well as virtualization, in scientific applications. Other presentations present frameworks and tools to ease the integration of new technologies in the grid landscape. Overall, we will attempt to better understand the opportunities and potential pitfalls in adopting these technologies such that future architectures leverage this important pool knowledge acquired and shared by early adopters.