The issue count for 0.4 is dropping rapidly to zero (https://issues.apache.org/jira/secure/IssueNavigator.jspa?reset=true&mode=hide&sorter/order=DESC&sorter/field=priority&resolution=-1&pid=12310865&fixfor=12313862) so it's time to start accepting patches for 0.5 in parallel with finishing review on the last 0.4 patches and getting a release candidate out.
0.4 has thus been branched to https://svn.apache.org/repos/asf/incubator/cassandra/branches/cassandra-0.4, so follow that for the increasing 0.4 stability you've come to know and love. Trunk is now for 0.5 development. (This is the point where we can say that, barring show-stopper bugs, no more changes will be made in the 0.4 API or on-disk format. Or the configuration file. :) -Jonathan
