4) Start to implement microxml based on the work of Oleg Kiselyov on
XML, the idea here is that there are still many (legacy) services that
rely on XML.
As the author of the first MicroXML parser (in Java), what I would do here is to translate <
https://github.com/jclark/microxml-js> into Scheme. I guarantee it will be much less buggy than anything done from scratch. ("If you think James Clark is wrong about a matter of fact, you should think more than twice before saying so.")
7) Start an SRFI about an HTTP client
I have some ideas on that which I will try to post when I get some time for it.