As you may well be aware of by now, Microsoft has released a Community Technology Preview (CTP) of PowerShell v2.0. This is pre-release software, not even a beta. It is not approved or even remotely recommended for production use.
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Because it is a CTP, documentation (other than the help files) is a little sparse. But all is not lost. Don Jones and I have updated our PowerShell book with an e-book release that covers the CTP. This e-book is part of SAPIEN's "IPO" program. The bottom line is that this is a great way to get solid reference material that won't become obsolete within a month of printing.
You can read more about this title at http://www.sapienpress.com/powershell3.asp. But wait, there's more: if you order before the end of November 2007, you can get the CTP e-book for $19.99. When you checkout at www.scriptingoutpost.com, use discount code VERSION2. You might also want to read the kind words Jeffrey Snover offered on this book.