Well, the Mystic Eye Games editor of the print version of Wild Spellcraft told me that the Pandaemonicist and Sculptor of Chaos prestige classes were too powerful, but I disagree, since I did try to balance them when I wrote them.
I usually don't remember prestige classes on their balance, but on their flavor. So, even though the classes in Tome & Blood might be a little overpowered, I love 'em, because they're cool. And though Song & Silence might have nice, balanced classes, I only really liked the Thief Acrobat, since the rest were boring to me. I much prefer bards.
Hey, Ryan, I sent you an email, asking for your help to name a gnome. I hope you get it.