For those like me who still use and love launchpad, i made a little package to install wangdoo without touching all the system files.
Download it here:
http://xkid.biz/projects/kindle/wangdoo-lp.zip
IT IS NOT A CUSTOM UPDATE
just extract it to the root of your kindle usb storage.
Press Shift D D to start the wangdoo server.
you then must hold D to launch wangdoo.
To leave wangdoo select the bottom item on the list. you must use shift d d again after selecting that option to relaunch it.
Enjoy