Five newish ODI blogs I have subscribed to recently
The practice of using Oracle Data Integrator (ODI)
This has some really great content. Frequent updates. However, in Russian. You will need Google translate.
Technology & Other Worldly Issues
Also some very nice content, but not many updates
My Little Blog
Mainly posts on OBIEE 11g. But some great content on ODI, e.g. loading data from Salesforce.