Knightsbridge released their Top 10 trends in BI. The Whitepaper is brief but they point out that the business is best suited to own and manage the organization's data. Afterall the business supplies the information and consumes the information; taking ownership over how the information is governed for BI only makes sense.
Knightsbridge's "6 key dimensions" for a governance program sound a bit technology and data quality focused. I may supplement them with The Gatekeeper approach and the business committment to taking ownership, especially of meta-data and proliferation of reports.
The ability to bring together multiple business units under Enterprise-level BI will require strong leadership. The business needs to assign leaders who have the authority and influence to navigate the political landscape.
When building a governance model, as Aloys points out, you want to start off with a 70%-right governance model, require committment from stakeholders, and paint a good looking end-state to help stakeholders through change.
Jim Wirth writes a more in-depth post about the top 5 Knightbridge trends.