When you say "Open", do you mean make Symbian open source?
If that's the question, then no way would they do that. That would be like Microsoft making Windows open source. They've got too much money and investments tied into the program, and as much as making it open source would be cool, to the average user of Symbian, it would be pointless to them. 95% of the people out there using Symbian based phones just use it as is, and us 5% wouldn't make it worth open sourcing it to let us tinker around.
Would it be cool :cool3:, oh yea. Do I ever see it happening, no so much.