Beowulf Clusters Book

[Brian G. Powell]

Finally I have been able to find the "Building Beowulf Clusters Book"
(or is it "Linux Clusters")
but I hesitate to buy it: I went to Reiter's and they said something
like the 2nd edition ought to come out in October; and another 
bookstore (MicroCenter) said "Well it will take many months after
it comes out before you see it on our shelf".

Does anyone know if the 2nd edition is coming out soon? Should I wait?

Should the errata on the website be good enough?