Hi Chaley !
This is blindingly fast compared the the other solutions.
1-2 seconds instead of 1-2 minuttes when starting Calibre.
Still have the pctread column while testing, fine tuning.
I'm a VERY happy Kindler right now
Maybe you/we could put this somewhere as a sticky or something ?
Other Kindlers might love this besides me.
Subject could be something like: Automagically mark books read