I'm an advocate for code review at the current place...

We already use fogbugz, and I'm pushing for us to switch to hg from svn so that we can use kiln too. Code review is one of the main features that I'm using as a lever. I fear that status quo / apathy may prevail though, since there is a contingent that wants to use git and if it's not unanimous, we stay where we are. Sigh.

Btw, our current process is a skype channel that we use to post links to commits (we use trac at the moment). It actually works pretty well.