This page is thin, its under development.
Some general references:
The client is X11 based.
The design is client-server, and does not rely on a shared file system for distributed operation. The tool is an ASCII command-line tool, and although it include perl cgi scripts for invocation from a web browser, it does not have an X11 interface.
Perforce provides RCS/CVS-to-Perforce conversion scripts.