I got SpeedTracer running yesterday. I imagine others could be run too. The trick, at the moment, is to be running a Chromium developer build - which, on the Mac, is much better than the current beta.

http://pgt.de/2009/12/09/using-speed-tracer-on-a-mac/

They are, just disabled for the moment due to a security risk

Try: http://asia.cnet.com/blogs/sinobytes/post.htm?id=63015336...