There is no way to automatically sort bookmarks by name/alphabet
Ed, this is a bug in Safari, not the open source WebKit framework. You file a bug with Apple about this at https://bugreport.apple.com/. If you don't have an ADC account, you can obtain a free "Online" one at https://connect.apple.com/.
You *can* file, even - one of these days I'll learn English.
filed as bug 5119850 with apple