Cecil is a project I started in November 2004. I worked on it's write support during the Summer 2005, thanks to Google's Summer Of Code.
During this first Summer Of Code, already one SoC project was using Cecil, and it's now included in Gendarme
For the Summer Of Code 2006, a the whole set of suggestions about CIL (4 suggestions) requires to use Cecil.
What a promotion for my tool!