Vim comes with a Pascal syntax highlighter, but it fails with most Delphi code. For one thing, it doesn't recognize comments that start with two slashes. It also doesn't recognize newer keywords. This project aims to improve things.
This is a Pathogen bundle, so the the easiest way to install it is to clone this project directly into your bundle directory:
cd ~/.vim/bundle
git clone git://github.com/rkennedy/vim-delphi.git