Just installed and configured Drupal 4.7.3 and noted an announcement asking for volunteers to test newly added support for the Oracle database.
Most open source, content management systems (WordPress, Joomla et al) use MySQL so it will be interesting to see whether there is much demand for a CMS running on an Oracle database.
On a similar note, Oracle are likely to confirm that the next major release of Siebel (8.0) will be available on the Linux platform. The official announcement is expected at Oracle OpenWorld later this month. This isn’t wholly unexpected as support for Linux in Siebel 8.0 was included in the public Statement of Direction (May 2006).
The availability of the Siebel on Linux is is likely to be an attractive option for smaller companies, some of whom who already deploy the Siebel database on a Linux platform.