This page isn't pretty - I'ld say yet, but that implies I'll get around to fixing it up some, which I doubt I will.
I've made a few pages for ACIS:
Fun with bias and superbias files
Some movies of ACIS biases - grab some popcorn, it may take a while to load
Raw acis images. This might also take some time to load.
Some analysis of ground calibration charge distribution.
The external calibration source obsid list