That is something we are planning - we started development with support for com_content but com_contact and com_users are planned very soon. Creating custom contact forms - with full control over what fields are displayed and where will be part of that.
I'd expect us to have this type of functionality within the next 2-3 weeks.
p..s sorry just found this unsent message in a tab in my browser
p.p.s. the good news is I have done some work on this area over the weekend and am close to being able to create custom forms for com_contact