This article focuses mostly on design and the principles of rapidly prototyping a game, and I would say very little has changed in those areas over the years.
Something that has changed is the available tools for rapid game development. Ludum Dare is a regularly occurring game jam (next one starts Aug 26), and their tools page is a good resource:
http://ludumdare.com/compo/tools/
Somewhat unrelated, but a lot has also changed in the commercial market for indie games since this was written. On one hand, it has gotten much easier to commercially distribute indie games. But on the other hand, there is much, much more competition in this space now.
Something that has changed is the available tools for rapid game development. Ludum Dare is a regularly occurring game jam (next one starts Aug 26), and their tools page is a good resource: http://ludumdare.com/compo/tools/
Somewhat unrelated, but a lot has also changed in the commercial market for indie games since this was written. On one hand, it has gotten much easier to commercially distribute indie games. But on the other hand, there is much, much more competition in this space now.