RRDtool is way cool
A while back I mentioned that I was looking into RRDtool as an alternative to gnu plot.
Well, I did and it is very nice. It took about a full day of hacking to fully understand the concepts behind the tool and get it working the way I wanted. But still it is much easier to work with [than gnuplot --ed] when it comes to time-sampled data. I was able to churn out a nice monitor, and I even made a konfabulator/yahoo widget out of the
resulting jpg file.