Ask HN: What's the state of the art for temporary landing pages?

I want to hear the HN community's current favourite technologies and techniques for building, hosting and analysing temporary landing pages - the kind you put up to gather potential user contact details and use cases before launching a new product. This is an area that has seen some rapid developments recently, with new SAAS products springing up all the time. I want to hear about: - Awesome hosted services with things like integrated A/B testing and automagical social network integration - Clever techniques for increasing capture (increasing user 'investment' leading up to capturing an email address, etc) - Your favourite ways of driving the right kind of traffic to a landing page - Thoughts on how best to give information about the product - video, text, graphics - Techniques for analyzing the data resulting from such a campaign. If you have or know a blog post about this area, be sure to post a link. Articles like this are what HN is best at; we have a lot of knowledge distributed throughout our skulls.