Hi Jens.
1. The D page says they should be lower case. Should Deimos module namesalso be made lower case?
Yes.
2. Should all interfaces be put in a common package, say deimos?
Yes.
* const T* should be replaced with const(T)*
Yes.
* How to deal with macros?
http://www.digitalmars.com/pnews/read.php?server=news.digitalmars.com&group=digitalmars.D&artnum=146873 Also please check this guide http://www.gamedev.net/blog/1140/entry-2254003-binding-d-to-c/