Sister Cittapala has written a wonderful recount of the retreat from last year. The theme was "32 parts of the Body". I remember attending, not really knowing what I was getting myself into - but finding great insight into how I saw myself, especially with ageing.
You can find a link to the report here
The theme for this year is "Perception" which I am sure is going to be just as insightful. The poster and forms will be up soon.