Asiawind has a Hakka section, a resource for information on our people, history and culture. There are also discussion boards.
The usual source... Wikipedia has articles on:
I have created this website using the American website-builder Squarespace. It is fairly easy to use, if you are interested in setting up your own personal/business website. However it is not free; fees as of April 2013 are $20 USD/month if you pay monthly, or $160 USD/year if you pay annually.