The Japanese Android game site AppGet has a new interview with ZUN at Comiket 82. The main topic is mobile gaming, which has become an extremely productive field for indie developers.
http://appget.com/c/news/7407/project-interview/- ZUN admits his current guideline for Touhou fan creation is based on outdated circumstances prior to today's mobile game boom, and needs rethinking. This guideline, last updated in 2011, expressly forbids the making of unofficial Touhou games for money, on all mobile or downloadable platforms including XBLA, Apple Store and so on.
- According to the current guideline, you can make free mobile Touhou games, but can't put in any method to charge money (no free-to-play model).
- He says he has no plan to make Touhou games for smartphones at the moment, then says he is interested in making mobile games.
- The rules of Comiket, which don't allow doujin circles to promote commercial products (which is only allowed in the coporate area), is also outdated and needs to change. By this rule, if he made mobile games, he too would have to leave the doujin area and go to the coporate area.