I've played with BiwaScheme and it looks like it's wonderfully implemented (well done) and the macro system seems to work well. I'm considering migrating some of my JS code to Biwa as I'm finding myself limited by a lack of macros and frankly just like Scheme.
Is is possible to output JS code using Biwa, rather than executing it directly? For example, using Sibilant you can write something like
sibl myfile.scm | node
to run a lisp program, and it transpiles code ratherthan directly runs it.