Tactical Game Innovation's ICS GLM TAG
I've always wondered if it would be feasible to put smoke grenades into a paintball/airsoft grenade launcher, but I have to admit I never wondered what would happen if you shot noisemakers out of such a launcher. I'd be willing to bet you'd need to travel to Eastern Europe (I believe the set-up is either from Russia or Estonia) to use these without people breathing down your back about it, but the sheer awesomeness of launching smoke shells across a field probably justifies the trip.
No information about purchasing etc. is immediately available from any sources I've seen, but I'll be sure to post up about it if said information becomes available.