I haven't seen anything about Windows compatibility--is this on the way or currently available somwhere if I put forth some effort? (I have a mac and an ubuntu box but the windows machine is the one with the discrete graphics card that I currently use with theano)
We haven't tried to build TensorFlow on Windows so far: the only supported platforms are Linux (Ubuntu) and Mac OS X, and we've only built binaries for those platforms.
For now, on Windows, the easiest way to get started with TensorFlow would be to use Docker: http://tensorflow.org/get_started/os_setup.md#docker-based_installation
It should become easier to add Windows support when Bazel (the build system we are using) adds support for building on Windows, which is on the roadmap for Bazel 0.3. You can see the full Bazel roadmap here.
In the meantime, you can follow issue 17 on the TensorFlow GitHub page.