Liquibase 1.0 RC1 has been released. Changes since 0.9.1 are primarily code refactoring to make sure it is a clean code base to work with post-1.0. The only new feature is a batch and shell script for easier running of the command line migrator. There were also the usual documentation improvements and bug fixes.
Please report all bugs you find with the release candidate so they can be addressed in the 1.0 release, particularly in the Maven support. Unless there are show-stopper bugs found, the final 1.0 release should be out in two weeks or less.