If you have a Google account you can make a blog, share movies, upload movies, pics, etc.

Create Digital Storybooks
Primary Access
JumpCut (my favorite)

Create Newsletters
LetterPop

Create Podcasts and Radio Broadcasts
Podomatic
(5th Grade Example)

Create Slide Shows (with Narration or Video)
BubbleShare

Collaborate on Concept Maps and Productivity Documents
Gliffy
Zoho

Educator Podcasts
Connect Learning
PodCast For Teachers
Teacher TopCast.com
Love And Logic Guy In A Tie
Guy In A Tie