Teal Sunglasses: Movable Type 3.0. Smart words from chuqui. More about what’s happened with MT. Main points are you have to be careful about the loyalty in your customer base.
While you can say its no big deal to leave the first blogging community behind, from my own experience, you have to be super careful, the early movers are the recommenders.
The fact recommenders are moving to other products is not a good thing.