There is a note in the FAQ for the phpBB Doctor board about not having plans to move to 3.0 right away.
Since you brought up 3.0, what are your plans in that area?
When version 3.0 has a stable public release we will determine what to do. At this time we have no official policy on the 3.x product.
Well, guess what. The first Beta was released Saturday, June 17th, 2006. A second Beta was released after the initial round of bug finding. So that means that we’re that much closer to a stable release. And that much closer to requiring an official position from the phpBB Doctor as to what we’ll offer in the way of support and code modifications.
As of now, we still have no position.