http://learnadanow.com is done by the same guy that does GetAdaNow.com
The Ada Information Clearinghouse has a section for learning Ada: http://www.adaic.org/learn/
There's a toy LISP I did as/for a tutorial, though this is the final product: https://github.com/OneWingedShark/Ada_Tutorial
And here's the home of the ARG, Ada's design group: http://ada-auth.org/
