This page will always link to my latest blog post with VTK Windows binaries, so you know you have the most recent ones. The latest post is:
You might still be interested in the older Python 2.5 builds:
However, if you’re really serious about VTK, ITK and perhaps even a kitchen sink, and you would like the choice between 32bit and 64bit on both Windows and Linux, you should really be looking at the DeVIDE Runtime Environment, or DRE.