UPDATE The SensioLabs Profiler has been replaced by the Blackfire Profiler.
The new PHP Profiler by SensioLabs is now in private beta.
To register for the private beta go to: profiler.sensiolabs.com. Just curious? Watch the video, it explains and demonstrates the profiler. Personally I’m very curious whether it will work for legacy PHP apps as well. Now waiting for my registration to be processed.