Links about plugin-development

hello everyone,
because of possibly higher visibility, i'm double posting some useful links about eclipse plugin development, to speed up those (like me) enjoying their first experience with this big toy.

http://www-128.ibm.com/developerworks/edu/os-dw-os-ecl-gameplgin-i.html
http://www.cs.unc.edu/Courses/jbs/lessons/eclipse/hello-popup-plugin/

and surely enough, the reference doc from eclipse:
http://help.eclipse.org/help32/index.jsp