[famousactress]

Part of our team uses Atlassian's tool Crucible for accomplishing this. I don't have a ton of hands-on experience with it, but they love it and it does look like it does a pretty elegant job at capturing a living code review online. http://www.atlassian.com/software/crucible/

[procyon]

this looks perfect. Though, it is a bit pricey for us. Ideally the code review tool would be integrated with Github, Pivotal tracker or lighthouse.

[famousactress]

Have you taken a look at Campfire? http://campfirenow.com/