Mistakes...
#1 - I used Hungarian notation, I really try hard not use this anymore.
So for readability instead of qaDate should be askDate. Hungarian notation is dead...or at least should be.
#2 - SALT is not a W3C standard. Man are the VoiceXML guys going to have my @$$! The point that you should take out of the book is that in my opinion that SALT and VoiceXML are equal, and that Voice Response Workflow is a much better way to go. SALT and VoiceXML are sooo 1990's.
#3 - I don't think I described the Concept grammars very well. It could of been done better.
If you find some mistakes in my book please let me know, or if you have a question, post it on the forums or email me directly.