I love Packt. As soon as I have told them that some people liked the book but complained about the typos, they proposed to go ahead and launch a new print cycle.
Basically it means that the next buyers will have a typo-free book. At least for all the typos that were reported on my Trac here, or at Packt's.
I am currently processing all the typos reported at Packt so I have a full list on my wiki, and will provide them the final list tomorrow.
Then, they will re-print it.
So if you already own the book, and you see a typo that is not listed, please let me know.