This is a nifty little application which is written in the Processing language, which allows you to draw stick figures and export them to Blender for animation.

http://screamyguy.net/sketchBoard/index.htm

There is an interesting talk on Papervision at the Blender conference:

http://river-valley.tv/conferences/blender_conference_2008/

Finally there is a way to get 3D into Flash, from Blender (or another program such as 3DsMax), with Animation! It's a tool called Cast3D.

Check out this:

http://www.rustpunk.co.za/blog/?p=10

You can download the Papervision 3D component for Flash CS3 from here:
http://code.google.com/p/papervision3d/downloads/list

I thought this was a very cool demonstration of the fluid capabilities of Blender. It shows a "magician" character, who "magically" conjures the water into different shapes:

Here are some more Blender and Flash tutorials that you can get for free:

http://www.cartoonsmart.com/demo_index.html

These technologies are still in development, but here are some incredible developments that can convert a picture into a 3D image:

http://www.photo-to-3d.com/

http://make3d.stanford.edu/

http://code.google.com/p/libmv/

Some links to free 3D models, that are compatible (.blend file, or can be imported) with Blender:

The Official Blender Model Repository
http://e2-productions.com/repository/index.php

Blender Architecture related 3D models:
http://blender-archi.tuxfamily.org/Models 
http://resources.blogscopia.com/index_en.html

I found another tutorial that shows you how to go from a 3D object in Blender, and export it as something that you can use with a Papervision or another Flash 3D engine. It exports to a Collada file, before you import into Papervision.

I came accross some more Blender 3D tutorials, that I thought were pretty good for beginners (they show pretty well how to use the interface):

http://showmedo.com/videos/series?name=blenderMoyesSeries001

Also, here are some more Blender video tutorial links:

http://www.ibiblio.org/bvidtute/

http://www.blender.org/education-help/video-tutorials/

I found this little comparison review of Open Source Video editing programs. The top three came out as KDENLIVE, OpenMovieEditor, and... Blender. Actually, the reviewer claims that those are the only ones he found really usable on Linux.