I second all that (I use dialogs a lot).
I would really like to see an event/message hook method for all and ANY control or window, especially dialog controls, even ones "hacked" in using dll calls - that way, you can keep all your code in the script and modify it easily (unlike having to create or rely on code in extenders)
Also, the latest visual styles (manifest) for all controls, so they don't look old-fashioned on newer versions of Windows.
Thanks for the latest enhancements though - they are great.