Wikipedia has a nice page on Oracle Data Mining (link). It provides a good overview of the features and history of the product. Here is a snippet of the text:
Oracle Data Mining (ODM) is a software product distributed as an option to Oracle Corporation's Relational Database Management System (RDBMS) Enterprise Edition (EE). This product supports a collection of data mining and data analysis algorithms for classification, prediction, regression, clustering, associations, feature selection, anomaly detection, feature extraction, and specialized analytics. It is designed to enable the creation, management and deployment of data mining models in the Oracle database environment.
Not bad. The text even mentions: text, spatial, and DNA mining, features that are usually overlooked by other pieces covering ODM. The External Links section also has a link to this blog.