no.
the iphone pretty much outguns the DS in the power-stakes.
You will not be seeing any ports...in that direction. It may become possible in the future that DS titles could see emulation on an iphone/touch, given the little thing is capable of near dreamcast-level power. (power...? couldnt find the word i was lookin for!) Plus it can already emulate GBA titles with no problem.
Besides all this, you would also need to conisder the impact of NOT having accelerometer or mulitouch support on the DS for any iphone/touch game or app.
So again...no.
It would have to be made from the ground up to meet the DS specific requirements and limits.
Dont ask anyone to make it either.