It seems it's become acceptable to use pounds for mass, equal to 0.45359237 kilograms. I've even seen it used as such in scientific contexts. Sometimes it's clarified by saying pound-mass as opposed to pound-force.
Totally, hence pedantic. But it does still seem to flow better the other way, if you discount the fact that most people tend to think of pounds in terms of mass. (Which of course is relevant and shouldn't be discounted.)
http://en.wikipedia.org/wiki/Pound_(mass)