Do the new docs here help at all? http://code.google.com/webtoolkit/doc/latest/DevGuideUiBinderI18n.html
I'm sorry for the murkiness here, I'm a bit vague on the workings of the -aux directory myself. @jat, do you have enough info to weigh in? -- http://groups.google.com/group/Google-Web-Toolkit-Contributors
