Some of my thoughts on the same:
Activities:
a. Bloggers can display the Software Freedom Day Event calendar.
b. Activity on the social networks
Events:
b. Demo on: Fun with Multimedia in Linux
c. Talks & Demo on: Ready to use open source Application for your office use
d. Open Source Content Management Systems: Quick Demo with Drupal, Joomla
and Wordpress
Regards
Siva.