Blog Action Day 2007 last October had more than 20,000 bloggers with an estimated combined audience of over 15 million viewers, reading and discussing issues on the environment.
In 2008, the topic will be poverty. Bloggers who sign on will discuss that issue from the view of their own blog. Serendipity35 will try to cross poverty with learning and technology, for example.
Blog Action Day will be on October 15th. If you have a blog of any kind, you can sign up to participate.
It would also be a good classroom activity, whether you are a blogger or not, to look at he poverty resources and information that will be online that day on participating blogs.
An example is The Global Fund which combats AIDS, tuberculosis and malaria which have a crippling effect on the fight against poverty. Blog Action Day for this year encourages bloggers to donate their day's earnings to The Global Fund as their official Blog Action Day charity.