Microarrays covers research where microarrays are applied to address complex biological questions. This new open access journal publishes articles where novel applications or state-of-the art technology developments in the field are reported. In addition, novel methods or data analysis algorithms are under the scope of Microarrays. This journal will serve as a platform for fast and efficient sharing of data within this large user community. As one of the first microarray users in Europe back in 1996, I am proud to serve as Editor-in-Chief and I believe we have assembled a highly proficient Editorial Board, responsible for a fair and fast peer-review of articles. [...].