Given Sony's current state, you guys are nuts if you think the 3DS is going to be affected at all by the PSP2. Sony just doesn't try at all. They're going to do their usual "quietly launch some expensive ass shit in hopes of making it look sacred and super high class" routine, which will be compounded by how unfriendly their dev tools tend to be leading to less games, and then the system will coast by on externally generated hype, with only a few "wtf" ads from sony. It'll tread water, but I doubt it's going to make any impact on the 3DS. Things like battery life (as long as it gets a few hours) and region lock do not matter to kids/nintendo fans.
I'm not saying it doesn't have a chance of being the better system after benefitting from longer development time and from being able to see the competition, just like Move is more advanced and better than the Wii controller, but sales-wise, it's more than likely going to be another blood bath, just like Move vs. the Wii, or better, the DS and PSP.