Integrating with UrlZen

For my twitter-like application (mumbl - not yet released) I've decided to give users the ability to shorten their long URL's for their mumbls as they're typing them using UrlZen.

Here's the Ruby implementation - I'll post a follow-up containing the jQuery portion. basically to get around XSS I call a URL on my system which then calls up UrlZen

require 'mechanize'
agent = WWW::Mechanize.new
@url = params[:url]
@new_url = agent.get("http://urlzen.com/shorten/?autocopy=true&url=#{@url}").search("//p[@class='short_url']//strong").inner_html