Contributing to gtkmm documentation

[John Taber <jtaber johntaber net>]

As I start using gtkmm for a large app, I am posting a lot of questions to the 
list that I could not find and appreciate the kindness of those answering - I 
would like to contribute back with some FAQ's and cookbook How-Tos to help 
others start using gtkmm - at the end of the tutorial it indicates that 
contributions should be in xml format - is there a particular authoring tool 
that is best ?  Anyone in particular to send it to ?
John