Bo, you don't need to modify them for Planetary work. Only for DSO's.
Peter (exfso) used to modify the SPC900NC but I don't know if he will still do them.
I have never heard of the Quickcam being modded.
If you do end up getting the 900 modified I have a Yahoo group dedicated to DSO imaging with Modified Toucams, and SPC900NC's.
http://tech.groups.yahoo.com/group/modifiedtoucam/
It is a fairly quiet group as there are not many people left in the world still long exposure imaging with them, but it has some links to capture programs.
The best one being 'Desire', the 'easiest to use' DSO webcam capture program ever written.
But if you only want to do planetary imaging, you don't need to modify. Just use the 900 as is
Some of my DSO images with a Modified Toucam:
http://groups.yahoo.com/group/modifi...13838/pic/list