Good vim tricks and tutorial page by Jonathan McPherson.
cheatsheet for the vim 7 spell checker plugin
article on effective vim editing by the author
another vi/vim reference chard
Yet another (smaller) vim cheatsheet.
Real-time collaboration within Emacs/vim/etc using a proprietary network service. Like what gobby/rudel is supposed to do but less free!
"TimL is a Lisp dialect implemented in and compiling down to VimL, the scripting language provided by the Vim text editor. Think Clojure meets VimL." Made by Tim. :)