Version 0.5.1 has been released and is now available from the download page.
This version fixes a few issues that came up after the 0.5 release.
* Resolve php4 compatability
* Resolve plugin activation issues
* Ignore orphaned db.php
There is still a known issue with links within wp-admin for subdirectory sites. This issue is being worked on and will be resolved in a future version of WP Hive.