You can always check my Latest VTK Windows binaries page to make sure you have the latest blog posting and hence the latest binaries. It also links to the “old” Python 2.5 VTK 5.4.1 binaries.
I’ve made available my home-baked VTK 5.4.2 Windows binaries. These have the new-and-improved version of my python-exception-patches integrated (more about this in a future post; a serious dead-lock has been fixed and as a side-effect, you can now run multiple VTK pipelines in different threads!) and have been built with Visual Studio 2008 (9.0) SP1 on Windows XP SP3 with full Python 2.6 support. Get the binaries (or my patched source) from the two links below. You want the binaries if you want to use VTK from Python.