Look what we have here: a Darius Burst scan leaked on Famitsu? Could this mean that it's coming to the PSP? According to the scan, that would be a yes.
Taito's robotic fish shooting game will indeed be gracing your handhelds, bringing with it the "branching paths" characteristic of the other games in the franchise. The difference here, though, is that there will only be eleven zones. That means probably less endings for Darius.
We'll keep you posted on any more info that comes out for this, particularly the official announcement from Taito Games.