This is something we're trying to address with the upcoming beta. You can follow us on twitter: @foldingtext, to get news about the beta when we start rolling it out.
As someone who uses Windows at home, iOS to "run my life", and Linux at work, I'm very interested in things that can run across multiple platforms. And as someone who regularly uses Workflowy, what are some things that FoldingText brings to the table that WF doesn't? (aka: why might I want to switch if I were able to use it across the platforms I need to have available?)