I sent the following e-mail message to the DTrace mailing list today announcing the release of mod_dtrace version 0.2a:
I have been working on an Apache DTrace module for the past few weeks, and just released version 0.2a. This module integrates Dtrace probes into Apache through the Apache hook framework. These probes can be used to observe and correlate a wide-variety of application and system behavior, which I have found useful for correlating network and virtual memory events with the requests served by Apache. I have written a few scripts to show some of the things I have been able to do with mod_dtrace, and have attached  some screenshots to this e-mail. If your interested in using mod_dtrace, you can grab the source code and shell scripts from my web site:
This is still a work in progress, and I would love to get feedback (e.g., script enhancements, code enhancements, feature requests, recommendations etc.) from the folks on the list. I would like to thank Clay McClure, Brendan Gregg, Adam Leventhal, Bryan Cantrill, Sean McGrath and Mike Shapiro for all of their help! Thanks a ton guys!!!!!! You rock!!!!!!!!!!!!!
As mentioned in the e-mail, you can view the mod_dtrace source code and scripts by surfing over to my website. Happy mod_dtracing!!!!!!!!!!!