While this report is primarily aimed at investors, it is useful reading for anyone who wants a more in-depth view of Opera. It contains raw numbers, detailed information about Opera's business models, and more. There's even some more detailed information on the acquisition of AdMarvel and FastMail.
I have added some "highlights" from the report, but bear in mind that I had to keep it somewhat brief (even though it's a fairly long list). For the full details, please read the actual report.