You can find more information on the speaker's site:
Continuity is a library for building a highly structured web-based interface for your application, without using ad-hoc state management. This is done through a minimalist API similar in scope to CGI.pm, abstracting away the request-response cycle by using continuations.
This talk will first introduce the concept of continuation-based web applications, specifically discussing the popular Seaside (smalltalk) framework. We will then introduce Continuity itself, demonstrating entry-level code to get started using it. Finally we will discuss architectural and philosophical implications of using Continuity, along with future goals for the project.
Code will be written and demonstrated live throughout the talk.