Comfort or style? Who says we have to sacrifice one for the other when buying office-appropriate shoes? But when the fashion gods are pushing only towering stilettos, executive women are often forced into that trade-off. Our feet crave footwear that will hold up to long workdays and frequent travel. On the other hand, appropriate choices can be limited and, let’s be frank, pretty boring.   Fall 2010, however, is one of those infrequent seasons that offers a better selection. Always looking to distinguish themselves from