This site makes use of new HTML 5 'getUserMedia'

You will need a developer version of Chrome or Opera until it gets released into stable browsers.

Chrome (Canary)
http://tools.google.com/dlpage/chromesxs

For the time being you will need to launch Chrome Canary via command line with the --enable-media-stream flag.
example: /Applications/Google\ Chrome\ Canary.app/Contents/MacOS/Google\ Chrome\ Canary --enable-media-stream


Opera
http://snapshot.opera.com/labs/camera/

Read more:
- http://arstechnica.com/business/news/2012/01/hands-on-building-an-html5-photo-booth-with-chromes-new-webcam-api.ars
- http://dev.opera.com/articles/view/getusermedia-access-camera-privacy-ui/