I actually haven't owned a bike with risers on it in 4-5 years. Though it was quite nice casual city/group of friends riding (I don't mind just riding up on the drops though either). I think if I find a cheap schwinn or something to convert on CL I'll throw risers on it, I have missed having some.

I would also echo Frantik's statement. I see a lot of drops on bikeforums.net but around the part of town where I actually see bikes, 80% of them seem to be risers.