I've started working with Tiptup to improve on ZuneBlade and he opened up a CodePlex project page for it:
http://www.codeplex.com/zuneBlade. You can find the latest stable release in the Release tab and the developer source version in the Source Code section. I've been working on it all day now to add a bunch of features and clean up the API to make it easier to use. It's now also completely Windows safe so you can use it to test on Windows without having to deploy to Zune each time.