Hi YeShito,
DroidScript is not really a cross platform system (yet)... but if you want to make porting to other platforms as easy as possible, then you should create all your GUI's using HTML and do as little native coding as possible.
Actually, I did post the beginnings of a project which converts DS native controls into JQuery UI controls and was hoping someone might take it further, but sadly no one has taken up the challenge :(
Regards
David