I just noticed that blogs.oracle.com has a new member discussing Data Mining. It has the obvious address: http://blogs.oracle.com/datamining/
I'm sure Charlie will give you lots of fun, interesting and cool details on data mining. So enjoy.
And just to vent my opinion, according the the TDWI report critiqued earlier, this is a topic to pay attention to. In-database analytics is something that will become more and more important as we see more data being stored. As with many of these things Oracle has been pushing this into the server for years. Now with Exadata V2 we are also pushing down (offloading) data mining functionality into the storage layers. All in all this will be an interesting technology area to keep an eye on!