Yes! InfiniDB ships with the InnoDB plugin, but it is not installed by default. If you want to use InnoDB, you simply install the plugin with the following command:
INSTALL PLUGIN INNODB SONAME 'ha_innodb.so';
At that point, you are able to use InnoDB as normal within your installation. You can create InnoDB and InfiniDB tables in the same database if you wish, however you cannot join the tables together in a SQL query as InfiniDB uses its own optimization techniques to satisfy queries. But, you can work with your transactional databases/objects as normal with InnoDB and also have your data warehouse/mart/analytic tables ready for use with InfiniDB.
You can also download updated version of the InnoDB plugin and install it instead of the version that ships with the InfiniDB bundle.
For more information on installing the InnoDB plugin, see: http://www.innodb.com/doc/innodb_plugin-1.0/innodb-plugin-installation.html.
