Adoption continues as OneVision announces the launch of new versions of Solvero and Asura with, as you may have guessed, support for XPS amongst the "80 new options and improvements" in version 9.0. If you're not familiar with OneVision solutions, it's highly likely that they formed part of the production workflow for the last newspaper or magazine that you read.
Solvero provides client-based interactive editing of a number of formats, including PostScript, PDF and now XPS, and is primarily targeted at pre-press and publishing solutions. Solvero is available on Mac OS X and Windows systems.
Asura provides automated correction and modification, again including PostScript, PDF and XPS, and is widely used in pre-press and newspaper workflows.
More details in the press release.