CSS3 Text Layout: Writing Latin bottom-to-top within line with blocks progressing to the right

Reading CSS3 Text Layout and experimenting with IE8, it seems to me  
that writing-mode doesn't have a mode that'd effectively rotate Latin  
text layout 90 degrees counter-clockwise. That is, text inside line  
going from bottom to top and blocks progressing from left to right.

Use case: Writing vertical column headings for a table in a way that  
degrades gracefully where not supported and cell shrink wrap happening  
after the header contents have been vertically laid out.

-- 
Henri Sivonen
hsivonen@iki.fi
http://hsivonen.iki.fi/