WebRTC has landed
This stuff really is revolutionary.
I've had it running with Google Chrome 25 on squeeze and wheezy, and
using a patched repro (reSIProcate) SIP proxy on wheezy.
Anybody maintaining any type of web package (e.g. a CMS, blogging tool
or even a webmail application) could potentially integrate this
other users within the web page.
The README.Debian file has details:
I'm also looking at the very similar JsSIP, it will hopefully be
packaged in a few days.