Another tidbit from JKR's site (semi-spoiler)

[justcarol67]

> > Don't read this message if you want to find the clues yourself!
> >
> >
> > S
> > P
> > O
> > I
> > L
> > E
> > R
> > *
> > S
> > P
> > A
> > C
> > E
> > *
> > *
> > Has anyone noticed that if you click on "Ancient Runes Made Easy"
on the Links page, you get an explanation of the creature-dice on the
Rubbish Bin page? it doesn't seem to save to the Scrapbook, though.
> >
> > Carol
> >
> 
> Now Tonya:
> 
> Carol,
> 
> Mugglenet has that one listed today along with two others.  Go check
it out!!
> 
> Tonya

Thanks, Tonya. BTW, does anyone think that the lightning bolt might be
a Sowilu rune? Compare the picture revealed by Peeves on the Links
page with this:

http://www.bewitchingways.com/runes/runes.htm

I always thought the scar was an Eihwaz rune because of the symbolism
and Hermione's reference to missing that question on her OWL, but this
one's a better match in terms of shape. And "Ancient Runes Made Easy"
suggests that runes will be important in Book 7. (Of course she's been
taking that class for a plot reason!)

Carol