1) If you mean smarty template, the developers do not want to implement smarty into WP. If you mean a template system, then yes, they want to do that and as far as I know have plans to.
2) Multi-Blogs is being addressed in the next release
3) not sure. WP does have archives, and it is included in the default index.php. Nicer archives by LaughingLizard extends this too.
4) Post to future can be done now. Simply click advanced editing when posting and you can change the post time. You can also set to use advanced editing each time you post by changing the "writing" under options.