You can achieve the same result with Qt with really few lines of code, but you have to insert multitouch emulation directly into the code of your application.

@Tiago
Since Maemo's X server does not support multitouch I don't know if what you want to do is possible. I mean, you can send two input signals simultaneously, but I think they will be processed one after the other.
Atm, I think that the only possible solution is to implement multitouch emulation directly into applications' code.