We want to move the free blog we have to a new paid website (both on wordpress). We need
1) the till now staff not to be lost
2) simple site, not blog
3) the same or similar way to send messages
3) use passwords in order to send messages
If you choose the other wordpress option then you will find that exporting wordpress.com blog contents into an xml file and then importing that file into a free template downloaded from http://wordpress.org can be accomplished with ease.