I play DDO. I also play Pathfinder PnP. I (along with my gaming group) switch over to Paizo and Pathfinder when 4th Ed was getting close to release. What I would LOVE to see is an MMO based in Galorian.
For those unfamiliar with DDO, it is based in Eberron, more specifically in and around Stormreach. it is actually a very good MMO based loosely around 3.5 rules.
For those familiar with DDO, my suggestions would be;
Instead of starting on Korthos; start in Sandpoint
Instead of going to Stormreach; go to Magnamar
Instead of Warforged and Drow; get Tiefling and Aasimar
Instead of True Resurrection; when they level to 20, they can come back as first level in Riddleport