Poll: Would you like to try const-by-default or not?

[Jarrett Billingsley]

This is not a discussion thread.  I think we've discussed enough.  :)

Basically there are these possible const implementations (there are others, 
but for the sake of simplicitly, I'll keep this poll to 2):

1) C++ style const, where you mark anything that should be const as such.

2) Parameters are const-by-default, and must be marked mutable otherwise. 
Locals, fields etc. are still mutable by default.

Walter doesn't want to stray from option 1, because 2 is basically "too 
weird."

Please reply with your choice, and maybe a small explanation of why.

I'll start this off by saying I'm definitely willing to try option 2.  I 
never really learned const-correctness in C++ because it looked so damned 
awful.  Option 2 makes more sense to me.