In Xcode 3.x I could do Edit > Sort > By Name. I cannot find this functionality in the new version of Xcode. How do I accomplish this?
It's a missing feature, if you want to sort permanently. However, there is a feature to view items sorted temporarily, namely in the jump bar:
Tip: Hold down the Command key when selecting a level in the path menu to view its items alphabetically.
http://developer.apple.com/library/mac/#recipes/xcode_help-jump_bar/Recipe.html