I feel like a broken record ... but we've been using SmartPLOT from Technesis for a long time now for both our AutoCAD & Windows print tracking. It has been incredible for us. Don't know how much it costs, because it was here before I got here.
I have heard of some other solutions through the Newsgroups ...
- PlotMinder
- Argos
- PlotLog
- XPlot Logger
HTH,
Vern