My first screencast, took about 1 day plus of fiddling and trying out different software.
1. In the end i used wink for the screen capture and annotation
www.debugmode.com/wink/
2. Camstudio use to capture the output from the swf
camstudio.org/
3. Audicity for trimming and fade out of MP3
audacity.sourceforge.net/
4. Virtualdub for encoding and putting the mp3 together
www.virtualdub.org/

Hope everyone enjoys it, though the upload quality is really bad.

Some links on using vimperator as well
1. www.linux.com/feature/114419
2. en.wikipedia.org/wiki/Vimperator