ODI is part of the Oracle statement of direction for data integration. There is more and more ODI opportunities on the market. OWB (former Oracle ETL tool) is no longer developped and I think support will end in 2015 so I guess a lot a company will need to migrate from OWB to ODI.
I suggest you to join the LinkedIn groups related to ODI to find some opportunities. You might also want to try OBIEE 11g because there is a huge gap between 10g and 11g.