ACGT is a European Union co-funded project aiming at developing open-source, semantic and grid-based technologies in support of post genomic clinical trials in cancer research. It addresses clinicians, bio-researchers as well as software developers' needs, providing an open platform where novel and powerful services can be offered and used by practitioners in the field.The ACGT Competition has been set up to encourage the development of Grid enabled services that can be used for the support of multi-centric clinical trials and research. It is open to all parties that are interested in developing ACGT-compatible services. The competition will take place between March and June 2010. Deadline for registration is 30 March, for submission 30 May.