openshot
Open source video editing? You betcha.
Well at last I am doing full DV HD video editing on my linux desktop. It is *NOT* adobe premier pro, but it works for me. YMMV!
On my spanky Ubuntu Lucid 10.4 64bit,(and on Karmic too) I installed a bunch of great stuff:
First, lets install Openshot. It is weak on compositing or frame by frame editing, but it does some pretty awsome effects and makes inskcape your title editor. Also if you master out wuith it, will do Vimeo, youtube and flicker and picas video al in HD, yup, very nice, but you need some extras
sudo apt-get install inkscape libavformat-unstripped-52