Dave Coffin has calculated the color matrix for IXUS950/SD850, based on Faust target shots. Here it is:
{ 14573,-5482,-1546,-1266,9799,1468,-1040,1912,3810 }
It will be included, under the disguise "Canon PowerShot A720", into dcraw from v8.87 on, and thus, eventually, into other soft that uses dcraw. I would say, it works very well. So, ArtDen, would you include it in dng4ps2 please?
A720 and S5IS owners, please give it a try too.