You can put an Xtracycle on lots of different kinds of bikes! Lily has a road bike with a conversion thingie on it. There are some pictures on her flickr account (http://www.flickr.com/photos/lilymonster/).

Here's a good one (http://www.flickr.com/photos/lilymonster/3803924497/).

I'm not sure it's a good idea to have drops on a utility bike. Not sure why. Just seems like they might be harder to maneuver that way. But I've seen lots and lots of hybrid/road bikes with Xtracycles on them.