I liked that straightforward question posted in the newsgroup.
In fact, FP2007 - Feature Pack 2007 - is a nice addition to the SP2 release of XP Embedded tools. It does have some new features that were never rolled out as QFEs for SP1.
More info on the Pack can be found on the product team blog.
The entire XPe documentation tree has been moved to FP2007.
FP2007 is free for XPe SP2 Toolkit owners.
Non-eval version is out there on Extranet website of Microsoft (ECE). Used to be available on OEM Secure Website that was unfortunately deprecated by Microsoft.
The best thing I loved about FP2007 is the stability of the toolkit. I can finally enjoy working with XPProEmulation and other huge projects and the development tools are not crashing. I have checked - it only required to change a few lines of VB script code that runs within TD (Target Designer) to fix the VB memory related issues while loading a huge number of components.
However, there are still some bugs in FP2007 about the toolkit. For instance, it doesn't like setting big pagefile on some ACPI HAL components. Please refer to this thread for more info posted on that bug.