I've created a release candidate for 0.20.204.0 that I would like to release.
It is available at: http://people.apache.org/~omalley/hadoop-0.20.204.0-rc0/ 0.20.204.0 has many fixes including disk fail in place and the new rpm and deb packages. Fail in place allows the DataNode and TaskTracker to continue after a hard drive fails. -- Owen
