It's easy to read, accessable, and not stupid and pedantic and ranty like eats, shoots, and leaves.
Also, she talks about stylistic methods. it's pretty awesome.
Commas are here.
Semi-Colons are here.
Apostrophes are here.
Hopefully she'll cover all of them, although dash and ellipsis seem to have been covered in the comments of the Semi-Colon essay.