moblie me advice pls

[parm21]

hi people this is my first post hope i make some sense here.

i have a iphone 3g and ipod touch and 2 pcs my wife has the new iphone 3gs and mac
i am trying to work out the best way we can have the following or if it is possible

to have one calander were we can view and update.
separate emails and contatcs sync, for example i wont want her contacts on my pc or phone and vice versa.
does anyone know if this is possible

many thanks