I recently used Neustar to do this. It has great integration with selenium-style scripts for load testing and monitoring. https://home.wpm.neustar.biz https://

I recently used Neustar to do this. It has great integration with selenium-style scripts for load testing and monitoring. https://home.wpm.neustar.biz https://home.wpm.neustar.biz http://www.neustar.biz/enterprise/web-performance/ http://www.neustar.biz/enterprise/web-performance/