download Yahoo messenger (with Voice and Videeo)  from  messenger.yahoo.com \n\nTest it out with typing messages back and forth.\n\nFor the Voice calls (FREE, PC to PC), the computger on each side needs microphone ability (built in to many newer laptops, or can be done with attaching a microphone).\n\nFor the video, attach a webcam (even a cheap webcam can do the job).\n\nGood luck to you and your brother!
Web Conferencing?