With the exception of the various 'TODO' items in the tutorial (I'm getting there, really..), it's to the minimal point that I wanted it to get to: a good set of concepts, widgets, and support for all of Tcl, Ruby, Perl and Python.
My question then... what next? I think it would be useful to sketch in the first cut of the "good looking Tk applications" screenshot gallery (suggestions?). The widget roundup, which is essentially a selective quick reference, is another area to consider, but I'm not sure of the value it will provide, so I'd welcome your thoughts on that.
As far as the tutorial, I'd like to extend it to cover additional topics, again fitting in with the "mainstream desktop applications" theme. Some contenders: toolbars, tooltips, drag and drop, printing, tabular data. And I know, not all of those have good answers, or good answers built into core Tk, but I think the topics need to be raised and best practice recommendations made where possible.
What other topics would you suggest? Are there parts of the existing material that you'd like to see developed further? Any feedback you can provide would be a great help, to say nothing of a great motivation!