Thanks for the reply.

It's a pity that there's nothing open source like the Tracelytics SaaS out there.

While it may be OK for a large company to build a full stack, not everyone can afford to build a full stack (write the web app, the monitoring suite, deployment, etc).

So do you mean the project is incomplete in its current form so it needs works to be done to enable its full potential?

My masters' thesis involves X-Trace, along with pieces for tracing common pieces of the web stack. I'm not ready to open-source it yet, but it's a definite possibility. I've published a preview of it at ICPE 2011, http://dl.acm.org/citation.cfm?id=1958746.1958783&coll=D...