Never heard of it for blasting, but interestingly I have heard of using dry ice for matting. I have a Datsun 240Z that I'm slowly restoring, and Datsun for some strange reason, glued down it's floorpan insulation/sound deadener matting BEFORE it painted the chassis's. Not too smart, to say the least, and also not surprising that a very large number of these old Z's now suffer from floorpan rust through. When discussing options for removing this matting with some of the Z veterans, several people made the suggestion that by filling the floorpan with dry ice, let it sit until it was nearly all evaporated, you could then take a rubber mallet and whack the floorpan. I have not done this myself (yet) but several others reported it works very well. The dry ice will make the matting and glue (almost the consistancy of undercoating) so brittle that it will literally crack and flake off/up and can be removed in large chips. It does not harm anything, unless of course you get too exhuberant with the rubber mallet!
I'm definitely going to pass along this link to my Z pals and see if anyone has tried it (USA or worldwide).
EDIT: Mentioned this on my Z board and someone passed along this link:
http://www.icetech.dk/english/index1.htm
Nice video section which includes an Oldsmobile being cleaned/stripped.