As a developer, I think it's interesting to have direct access to the clean text output that Offline Content Generator/Book Creator and Wikipedia-Telnet service provide, from a standard MediaWiki API option similar to prop=text (HTML) or prop=wikitext in action=parse (ideally, it would be just another prop=x option). This would allow to easily access and show useful outputs for article contents in tools working in text mode environments like IRC or shells (as mine does).
I've already been told by @cscott that OCG and the extensions/software involved aren't easy to connect to the MediaWiki API, so maybe this task isn't (much) feasible, but maybe it can get some support or some alternative ideas or ways to get done.