It is available as a pay-what-you-like (including free) download.
Since Evil Hat recently made the Toolkit available under OGL, you can download the pdf from rpgnow.com or drivethrustuff.com.
And anyone with the Kickstarter pdf is legally able to share it with you if you're in their campaign.
[Now that the Toolkit is published and OGL (see above) this answer is outdated, but I'll leave it here for the historical record.]
It's that simple, and that complex: the pre-publication pdfs are sharable within groups for playtesting purposes. You might come into chat some time and see if anyone can run some online sessions (with fancy Toolkit bits) with you so you qualify; if I find the time, I'll do it!---