Have you seen this: http://www.sapienpress.com/PowerShell2.asp? Not yet available in print, but currently available as an eBook. Available in print on December 1st. Our first edition is still available only while (dwindling) supplies last.
And what about this: http://www.sapienpress.com/PowerShell3.asp? eBook only… but it covers PowerShell v2.0 CTP! Available electronically on November 12th. Will be under $30 through the end of 2007.