The present invention is related to an information processing system, a service providing apparatus and method, an information processing apparatus and method, a recording medium, and a program that are intended to simultaneously share content data in private virtual spaces. A home server 11 is arranged at user A's home. A portable user terminal 1 and so on can access the home server 11. A virtual home DB server 21 supplies the layout information about virtual home and so on to the portable user terminal 1. An authentication server 22 executes authentication processing on the portable user terminal 1. An inter-user-terminal communication relay server 23 executes the processing associated with the communication between a plurality of users. A user information holding server 24 stores the personal data of each user and the content data, which are shared with other users. The present invention is applicable to programs realizing realtime communication by use of the Internet.