I've written an article on the Jasper project that was just published on O'Reilly's WindowsDevCenter website.

Jasper is a new incubation project within the ADO.NET team at Microsoft, that leverages Entity Framework to allow developers to build websites dynamically. 

If you are just curious to learn more about what the heck Jasper is, why you should care about it or want to get your feet wet with the CTP, hopefully this will give you a good start.