Little bash script that toggles showing hidden files in Finder - add to your .bashrc file.

show

#! /bin/bash

# show/hide .files
function show {
showfiles=`defaults read com.apple.Finder AppleShowAllFiles`
if [ "$showfiles" = "TRUE" ]; then
    echo "Files Hidden";
    defaults write com.apple.finder AppleShowAllFiles FALSE
else
    echo "Showing Hidden Files";
    defaults write com.apple.finder AppleShowAllFiles TRUE  
fi

killall Finder
}