Posterous, a very easy to use blogging tool, ranks 55= on the Top 100 Tools for Learning 2009 list and is one of the 10 tools for 2010 that I think are worth considering.
Yesterday Posterous announced the launch of big upgrades to their group blog system so that now you can setup a group blog to have its own profile AND its own autopost sites.
If you are looking for a guide to using Posterous, you'll find some links in our Posterous Reading List.
