We are actually using a product called HFNetChkPro from Shavlik (http://www.shavlik.com/). The raw data is dumped into a DB already. Unfortunetly, we weren't happy with the reporting capability of the product so I was asked to come up with something from a higher level. So I automated a dump of the DB nightly and then run my script against the dumped data to build a pretty HTML page from the upper ups.