[st3fan]

Unfortunately 'the cell phone' does not exist. Even though they all probably support some form of MIDP, they are all slightly different. It's a true nightmare.

I would certainly pick a niche market like S60 or iPhone/Touch and not try to be cross-cellphone compatible.

[zacharye]

And then you can work native in order to give your app much more access and power than a java app would have.