!!# At the top of my deploy.rb
yamled = YAML.load_file(File.join(File.dirname(__FILE__), "deploy.yml"))

set :application, yamled["app"]
set :repository,  yamled["rep"]

role :app, yamled["app"]
role :web, yamled["app"]
role :db,  yamled["app"], :primary => true

set :deploy_to, yamled["apppath"]
set :deploy_via, :export
set :use_sudo, false

set :user, yamled["appuser"]
set :password, yamled["apppass"]
set :scm_username, yamled["repuser"]
set :scm_password, yamled["reppass"]

!!# In config/deploy.yml
app: # Your application's web address
apppath: # Your application's path on the application server
appuser: # Your username on the application server
apppass: # Your password on the application server

rep: # Your svn repository
repuser: # Your username on the svn repository
reppass: # Your password on the svn repository