Newspeak language
newspeaklanguage.org
newspeaklanguage.org
He's reworking the Smalltalk language, essentially adding capabilities (no access to anything you're not explicitly granted), and doing mind-blowing UI work (with other people), the Hopscotch framework.
See http://langnetsymposium.com/2009/talks/08-GiladBracha-Hopsco... .