Nick Shaxson's Treasure Islands - events in Bergen and Helsinki
For the Bergen event, Follow the money: Financial secrecy, international taxation and development, see here for information and the presentations.
For the Helsinki event, here are some links from the Finnish press (headlines roughly translated via Google):
Half of the world's trade passes through tax havens YLE
The biggest tax havens are in the OECD countries Kansan Uutiset
Tax havens are an integral part of the Greek problem Talous Sanomat