Bio::Das::ProServer is an implementation of the BioDAS protocol, http://biodas.org/ for the serving of biological data using XML over HTTP. Bio::Das::ProServer is designed as a lightweight alternative to some other DAS servers. Version 2.0 is a drop-in replacement for previous versions but has a core based on the POE system which is much better tested and debugged than the ProServer v1 core. ProServer can be seen as the server-side complement to the Bio-DasLite client. More information can be found at the ProServer homepage: http://www.sanger.ac.uk/proserver/ Roger M Pettett <rmp@sanger.ac.uk>