From the Reversing a Dumb Idea dept.:
As reported yesterday from CommunityOne:

* MySQL Server is and will always remain fully functional and open source,
* so will the MySQL Connectors, and
* so will the main storage engines we ship.

In addition:

* MySQL 6.0’s pending backup functionality will be open source,
* the MyISAM driver for MySQL Backup will be open source, and
* the encryption and compression backup features will be open source,

where the last item is a change of direction from what we were considering before.

blogs.mysql.com