I haven't really seen any info about it, so I thought I would share a little of what I have seen, related to using fw/1 on boxlang. If other people are seeing different things, I'd love to learn about them, but also wanted to share to maybe help people along.
so far, i have only played with some trivial apps, and am running through commandbox, but this is what I have noticed I needed to alter.
I had to replace framework references to getComponentMetadata() with getClassMetadata() and (de)serializeJson() with json(de)serialize()
I have not gotten boxlang to run with the default/basic application structure, ie. where my application.cfc extends framework.one; but I have been able to run it with the alternative application structure, the Application.cfc/MyApplication.cfc from framework folder used as templates. *this probably annoys me more than it should, but it's literally the only thing (outside of testing) i've ever used the alternative structure for.