Cinelerra

http://cinelerra.org/
http://heroinewarrior.com/cinelerra.php3
http://fr.lprod.org/wiki/doku.php?id=video:cinelerra

Installing cinelerra on Ubuntu 8.04 is easy thanks to lprod.org:
Add the lprod sources to your source list (/etc/apt/sources.list):

## lprod video software repository:
deb http://lprod.org/deb/hardy/ ./
deb-src http://lprod.org/deb/hardy/ ./

then do:

sudo apt-get update
sudo apt-get install cinelerra