MGS Here's a nasty-ish hack to make labels with vertical text. Not rotated text, just with the letters stacked on top of each other. For spaces, you need to insert two newlines.
label .l -text "Vertical\n\nLabel" -wraplength 1 pack .l
Make sure the label is packed/gridded so as not to expand or fill horizontally.
RS Another way is:
label .l2 -text [join [split "Vertical text" ""] \n]
Mike Tuxford thinks both of those are clever and would come in handy for use with Animated Vertical Tabs