I recall meeting a gal at the Ottawa Marathon Expo several years ago that had just purchased her first running dress and was looking for seamless panties to go with it.I don't think running dresses ever really took off - not like running skirts at least. Although I don't actually own a dress of this sorts (yet) I know that my fear would be accidental exposure. It can't be much different though from a running skirt - especially considering my preference is a skirt with briefs, not full shorts underneath.
A friend recently introduced me to the Nuu Muu brand. The patterns alone are adorable and I love the dark contrasting piping on the sleeves and neckline. There also appears to be a slit in the skirt - cute! Even cuter is the teardrop detailing in the neckline. I'm definitely willing to try "dressing" for a run next summer.