Embed Unicode characters!

Hi,
I often find myself needing a particular Unicode character, so I  
google e.g. "black bar unicode" and then copy it from that page.
This is 2010. Why does this page - http://www.w3.org/TR/MathML2/bycodes.html 
  - not have the actual characters displayed? This would be perfect...  
you have keywords and everything!

-- 
Isaac Rogers
Point Lighting
The most exciting phrase to hear in science, the one that heralds new  
discoveries, is not 'Eureka!' but 'That's funny...'
-Isaac Asimov