From a UX perspective, I'd also put a 'Register your board for free' button somewhere above the fold (in the top-right corner, for example). It doesn't really make sense to only have it at the bottom of the page, since it is supposed to be your main CTA.
Thanks for the feedback!
You're right - the CTA was deliberately at the bottom when I originally designed the site just to prevent a flood of potential registrations at that time when I wasn't ready.
But now I don't see a reason why it can't be moved up!
This has now been updated. https://forumspark.net/
Thanks again 
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