Actually, yes. I've worked on moving Eyrie.net stories into MOBI format.

In order to do that, I wrote a tool (Text-Transformation Language) in QB64, so that I could write a re-usable "script" to move Gryphon's ASCII format into .HTML, and then I could use something like "Calibre" to move that HTML into MOBI and EPUB.

You can find Text-Transformation Language here:
http://dustinian.com/pg/texttransformationlanguage

You can find an explanation of Text-Transformation language, including a "sample" script that it written expressly for moving Eyrie stories into HTML here:
http://www.qb64.net/forum/index.php?topic=4502.0

I meant to get more posted by now, but my wife and I are expecting, and our due date was literally yesterday. I'm still on pins-and-needles waiting for my daughter (our first-born).

I have a 1.6 of TTL in-progress that fixes a few bugs, but if you compile TTL in QB64... the current eyrie sample script has run on all the stories that I've tried.