Dear Log,
Tk seems to be tragic, in a very Greek tragedy kind of way. That is, a lot of people did their darnedest to do the right thing with it, and they did a good job individually -- but yet somehow it all faills to fit together into a sane result. Instead, Tk fits together like an ISO-standard nightmare: pure arcana. It's not fair!
The closest I ever came to finding something usable were the XML GUI things like Glade and QT Designer.
On the whole, it's just much, much easier to develop a web page...
-Dom