I commited some new modules lately :
* PNP for WebUI
* Graphite for Broker and WebUI
For PNP, you just need to configure your PNP URI in the module and add it to your WebUI configuration, and then you will have PNP graphs shown in the detail page.
For Graphite (http://graphite.wikidot.com/documentation) it's a perf data database/interface that is design to manage huge inputs. There is a broker module to send data in this database and a WebUI one to show them :)
You can see in the source repository the module sample. Play with them, and let me know what your are thinking about it :)