Hands Dirty with Java and Open Source

in case someone is in need of a guide on how to get up-to-speed with portlet development (JSR-168) using the struts2 mvc framework, spring, and maven, i have written here a How-To guide:

http://edwin.quita.googlepages.com/Maven2HowTo.doc

and the archetypes here:

http://edwin.quita.googlepages.com/portlet-archetype.zip
http://edwin.quita.googlepages.com/service-archetype.zip

Note:
you have to integrate some i18n features yourself.

p.s.
here's an HTML version of the document provided by google: