Last version of the SystemStats2 can be downloaded here.
I'm working on an entirely different approach for SystemStats3. Although proceeding slowly (not enough time), it consists of a very light C++ poller daemon, using a flatfile data format, and php generating the graphs using gd library. No more rrdtool, simply because it turned out it took too much resources
and I like simple things to be simple
(then again, it is not that simple rewriting from scratch ..) SystemStats3 is running at my local server, find the demo here.