This is an announcement for the paper "Computing the complexity of the relation of isometry between separable Banach spaces" by Julien Melleray. Abstract: We compute here the Borel complexity of the relation of isometry between separable Banach spaces, using results of Gao, Kechris and Weaver. Archive classification: Functional Analysis; Logic Mathematics Subject Classification: 03E15 The source file(s), melleray_banachisometries.tex: 34260 bytes, is(are) stored in gzipped form as 0511456.gz with size 11kb. The corresponding postcript file has gzipped size 54kb. Submitted from: melleray@math.jussieu.fr The paper may be downloaded from the archive by web browser from URL http://front.math.ucdavis.edu/math.FA/0511456 or http://arXiv.org/abs/math.FA/0511456 or by email in unzipped form by transmitting an empty message with subject line uget 0511456 or in gzipped form by using subject line get 0511456 to: math@arXiv.org.