##Install Homebrew
ruby -e "$(curl -fsSL https://raw.github.com/mxcl/homebrew/go/install)"
##Install Fish Shell
brew install fish
##Allow Fish as a type of shell
echo "/usr/local/bin/fish" | sudo tee -a /etc/shells
##Run configure
bin/configure
##iTerm 2
http://code.google.com/p/iterm2/downloads/list
You will find iterm related goodness in the iterm directory.
I use Inconsolata 18pt and the Solarized Dark iTerm color profile (also provided)