Show HN: use virtual cloud displays to monitor your competition

Pretty cool, few minor things :

1) You might want to restrict your own domain, e.g http://gowatchtower.com/preview?url=http://gowatchtower.com/...

2) Will you be able to get around X-Frame-Options ?

3) The ability to save page on an anonymous account before signing up may probably help conversions?

We created this as a hackathon project and have cleaned it up a bit. Interested in feedback from the HN crowd!