Examples

• mcandre's vimrc, with g:vundle_default_git_proto set to 'git', for BusyBox / Android compatibility.
• gmarik's vimrc
• mutewinter's Vim Config of Champions
• vimified - Ultimate, kick-ass VIM configuration on top of Vundle
• ivim - Vim Distribution of Xiao-Ou Zhang Using Vundle
• fisa-vim-config - lot of python, autocompletition, fuzzy finder, class browser, debugger, ...
• moshen's vim config - relatively simple vundle config with a more robust setup script
• dd-vim DD Vim Configuration - a good starting point to make your own Vim configuration
• dotvim - Drop in vim configuration
• Sibin's vimrc - Uses the environment variable $VIM, making it more portable. The other examples (i.e. above) weren't working on the Windows machine I use.
• timss' vimconf - Extensive vimrc with easy install and -everything- in the vimrc is explained!
• Auto Installing Vundle From Your Vimrc
• spf13-vim
• yann2192's vimrc - Special config for python and go.
• Rory O’Kane’s vimrc
• nickaigi's vimrc - Beginners vimrc, heavily biased for python development
• martyn/.vim - A dvorak-based vim layout. Includes plugins for ruby, clojure, go, and others.
• lucascaton/vimfiles - Plugins for Rails, Javascript and other things.
• justincampbell/.dotfiles
• mengbo/splite.vim - Splite config into lots of small files, each file only config one plugin.
• krisleech/turbo-vim - Example of latest Vundle syntax, with automatic bootstrap of Vundle for new vim installs.
• k-vim
• axiaoxin/vim-settings Vimrc for Pythoners
• jalcine/virmc Using a plugin layout to handle configuration for Vim.
• adilansari/dot_files/.vimrc more pythonic vim.
• Sukima's vimrc config - Example vimrc setup for use with homeshick with graceful handling for environments where Vundle is not available.
• Square's maximum-awesome - Config files for vim and tmux, lovingly tended by a small subculture of peace-loving hippies. Built for Mac OS X.
• Pivotal's vim-config
• mzlogin/config-files
• jaywcjlove/vim-web Web development
• ragavendra/vim_tmux Config files and instructions for Ruby development using vim and tmux
• webastien-vim web/PHP, almost all the config in a plugin managed by Vundle (Mac / Linux)

If you have an interesting example, feel free to add a link to your config.