It's been a good day for finding things: I also found the scans I made to compare two film scanners.
So if anyone has been wondering what a checker looks like: http://www.panix.com/~johnf/digital/chart.html (Now you can see why I switched to the LS30, can't you?) The colours of each square are very carefully controlled, and the RGB values (in several colour spaces) are included with the chart.
