Poseidon is now Trident. March 2010 is unlikely, but not impossible. The catch is that we actually have had different people working on Trident along with Dolphin 7, sometime helping D7 team, but not all the time.

On top of that first Trident-based application will be basic in functionality. Full-size Dolphin 8, based on Trident won't happen in 2010 for sure.