Not satisfied to simply speed up their own site – Google is now speeding up yours (if it’s the first result) from search results pages when you use the Chrome browser. They’ll be making the technology open source when it is released – so that it will be available from all browsers. Here’s a demo video:

Google had this to say about Google Instant Pages on their blog:

When we trigger Instant Pages for your site, users can start interacting with your site almost immediately, without having to wait for text and images to load. We’ll only trigger Instant Pages when we have very high confidence that your site is the exact result users are looking for.

They’ve put up a test page to show whether your page would properly pre-render in Chrome here, and discuss more details on the Google Code developers blog here.