How to design a video chatting website?

HI all,

I am a programmer and halfly a website designer.

I have some experiences of doing video/voice tcp/udp communications, and I
have written some very simple programs that can do these kind things...

I have used C++ as my programming tool and have used other languages...

Recently I wanted to do a video chatting website... multiple users can click
on the host's profile and select a host to chat with. They can view the
webcam from within their browsers.

How to implement this, given that I sort of know how to do single
point-to-point video/voice communication programming?

Is this "view within the browsers" a good idea or "asking the users to
download a client software" a better idea? Which one is better in terms long
term performance and troublesomeness to maintain?

Maybe I should do Linux+PHP+MySQL+a video chatting program?

Or I should do Linux+JSP+MySQL+a video chatting program?

I really curious about how this "user click on selecting a host" interacts
with the video chatting program, because I am really only know very little
about website creation!

Thanks a lot!

ps. Is there a more focused newsgroup or online forum to discuss about this
kind of topics:?

Thanks a lot!