Employee Recognition- Appreciation Tree Concept

Dear All.....Greetings..............
We at our organization are planning to implement " Apprciation Tree" concept basically to develop the culture that recognizes and appreciates the unique contributions made by each staff member. it also provides opportunities for peer recognistion. (refered some article)
whether any of the HR friends have an idea of this concept or implemented this kindly give us the informations on
Actual methodology of this concept
what are all the topics/guidlines which can be covered under this concept
request for the feedback.........
Aravind P

This topic also is written in wikipedia and about.com.

You can find it by using Google.
Apart from that, you also ref more information at: Employee recognition books

Rgs