I just tried this today. I did take the flask off the burner and put it on a cool area of the stove for a minute. From there I put the flask in cold water in the sink on top of a small cooling rack and let it sit for about a minute before adding ice to the water. So far, so good!
Also, I have a small wire heat spreader that came with my Yama Vac Pot. This is very similar to modifying a wire hanger and putting it on the stove. (I've done that, BTW, and the hanger had a coating that burnt off onto the stove and was a really a biatch to clean off). I used the wire piece under the flask just in case. Although from what I read in this thread I don't think this is required on a ceramic smooth top electric stove, I guess it put me at ease so I am going to continue to use this as a precaution.
When I was listening to the Brew Strong episode on Starters the other day I picked up a great tip. Instead of adding DME directly to the flask, they recommended turning the heat off, dumping the almost boiled water from the flask into a metal bowl and using a metal whisk to stir in the DME and yeast nutrient if you're using it. I used a heat mitt when handling the flask as to not burn the hell out of my hand. After that you can use a funnel to pour the mixed solution back into the flask. I added some firmcap-s to the flask and this worked beautifully!