I've seen several hybrids with aerobars and have been recommended to get them by my LBS. The riders I've seen with them generally zip by me at a good clip, too.
Personally, I'm not entirely comfortable with the idea of not having complete control of the bicycle and I don't know how the aerobars would affect the handling.
I love the FX series. I have an '07 7.3 and my girlfriend just bought an '09 7.2.