Derek Wyatt’s Screencasts – By far the best series on learning Vim I’ve seen. Must see.
http://www.vimeo.com/user1690209/videos
UPDATE – Derek Wyatt has created a new, more organized site for his Vim tutorials
http://www.derekwyatt.org/vim/vim-tutorial-videos/
Vimcasts – This is a good link to add to your rss reader. Updates fairly often with good vim tips.
http://vimcasts.org/
Codeulate Screencasts’ Vim for Rails Developers – I actually haven’t gotten to watch this yet but I will be getting it soon.
http://www.codeulatescreencasts.com/products/vim-for-rails-developers