So famo.us has got a pretty bad reputation, but it's actually a really good idea. The code is actually really well written too, and I'm sure that any bugs it has.. vis a vis scrolling etc.. are not design faults. They can be fixed. This is probably the best technical explanation I have seen of what famo.us actually is : http://ibm.com/developerworks/library/wa-famous/index.html
Wrong thread? Or do you know something we don't about Frame.io's choice of interaction framework? :)
Yea looks like the title got edited. This Signup page is built in Famo.us