Yeah, I used some of that, but it just didn't give me the same level of satisfaction as burning 'em! My can of Raid said to wait until morning as well (ala Randy's post above), but after getting stung I wanted satisfaction...NOW!
Spent the past weekend working on the soffits and gutters of our house, and sure enough there were some wasp & hornets nests up there as well. Used three cans of Raid, and left the "flamethrower" back in the shop this time.