I asked Brodit for an active holder, this was their reply: Q: Can you inform me if and when Brodit will release an active holder for the Nokia N900? A: For the moment we don’t have any plans for this but it can be changed so please check our web for updates in the middle of December. So let's all mail them to produce a n900 active holder
We hope to release holders for this phone before Christmas. Please check our web for updates.