The January CTP was released last week. I won't be updating my chapters for this CTP, because I have received a later CTP (Feb CTP/RC0) to work with...so if you are reviewing my book you may have to email me with questions. 

Here's the instructions to build a machine or VPC for this latest release.

1. Operating System: XP Professional with SP2 or Windows 2003 Server (note: I'm not including Vista/Longhorn yet, VPC isn't working well with those)
2. SQL Server: Install SQL Server 2000 or 2005, but you can skip this step if you want to use SQL Express which is installed with Visual Studio 2005 if you elect to.
3. Visual Studio 2005: include SQL Express if you didn't do step 2. NOTE: I like to keep a VPC handy up to this point, and make copies of it as I need to rebuild for future WinFX CTP releases.
4. WinFX Runtime Components (Jan CTP): http://www.microsoft.com/downloads/details.aspx?FamilyId=61DD9CA7-1668-42E4-BD37-03716DD83E53&displaylang=en
5. Windows SDK (Jan CTP):  http://www.microsoft.com/downloads/details.aspx?FamilyId=64750EEF-D4A7-4CC8-92F2-9A201268A231&displaylang=en
6. Visual Studio Extensions for WinFX (Jan CTP): http://www.microsoft.com/downloads/details.aspx?FamilyId=5A0AE4CD-DC79-4B12-8A05-B6195F89FFA2&displaylang=en
7. Visual Studio Extensions for Workflow (Jan CTP): http://www.microsoft.com/downloads/details.aspx?FamilyId=A2151993-991D-4F58-A707-5883FF4C1DC2&displaylang=en

There's a Go Live license now available for WCF and WWF. Here's the link to details: http://msdn.microsoft.com/winfx/getthebeta/golive/default.aspx

UPDATE 01/26/06 - Don't forget to read the January CTP notes regarding support for WS-AT. You have to install COM+ QFE for this functionality. http://msdn.microsoft.com/windowsvista/support/relnotes/winfxjanctp/default.aspx