Below you’ll find the slideshow of my presentation on Jetpack’s Portfolio and other Custom Content Types.
Since then the Jetpack Portfolio module was expanded to include also “Testimonials” as post types, however integration into the site is not as seamless as it is for the Portfolio Content Type. To successfully integrate into the site, the Theme would need to support it on its templates. More details for Theme developers and designers can be found on Jetpack’s site.