I vaguely remember this from WWDC this past summer, but can't seem to find it in the headers/documentation now. Supposedly, in 10.3 Cocoa gained the same sort of "smart" text truncation available to Carbon apps via the Appearance Manager: truncating to a pixel width instead of a character width, with automatic insertion of ellipsis ("...") characters. But I can't find any specific API for this now in the Foundation or AppKit headers... anybody seen it?